feat(ui): defaults.json-backed new nests; retire .nstdot templates

New nests now load plate defaults from %APPDATA%/OpenNest/defaults.json
instead of a .nstdot nest template:

- Tools > Nest Defaults... edits the file directly (new dialog).
- Tools > Save Current Plate as Defaults captures the active plate with
  no dialog (visible when a nest is open).
- New_Click no longer unzips a template; a corrupt defaults file warns
  once per session and falls back to built-in values.
- First run converts an existing NestTemplatePath .nstdot to
  defaults.json and clears the legacy setting (kept readable on a
  failed conversion); the setting itself stays, marked legacy.
- Save As no longer offers the .nstdot filter; SaveTemplate removed.
- BomImportForm and OptionsForm template plumbing removed in favor of
  the shared NestDefaults store.

OpenNest.Data/NestDefaults.cs

@@ -4,6 +4,19 @@ using OpenNest.Geometry;
 
 namespace OpenNest.Data;
 
+/// <summary>Outcome of <see cref="NestDefaults.Load(string, out NestDefaultsStatus)"/>.</summary>
+public enum NestDefaultsStatus
+{
+    /// <summary>Defaults were read from the file (invalid fields still fall back individually).</summary>
+    Ok,
+
+    /// <summary>No file exists at the path; built-in fallback values were used.</summary>
+    Missing,
+
+    /// <summary>The file exists but could not be read or parsed; fallback values were used.</summary>
+    Invalid,
+}
+
 /// <summary>
 /// Plate/nest defaults persisted to a single JSON file
 /// (by default %APPDATA%\OpenNest\defaults.json), replacing the
@@ -56,18 +69,18 @@ public sealed class NestDefaults
     public static NestDefaults Load(string path) => Load(path, out _);
 
     /// <summary>
-    /// Loads defaults; <paramref name="fileExisted"/> is true when the file
+    /// Loads defaults and reports whether the file was missing, loaded, or
-    /// was present (even if it failed to parse), so callers can surface a
+    /// present but unreadable/invalid, so callers can warn about a corrupt
-    /// warning when a present file did not load cleanly.
+    /// file while still returning usable values.
     /// </summary>
-    public static NestDefaults Load(string path, out bool fileExisted)
+    public static NestDefaults Load(string path, out NestDefaultsStatus status)
     {
-        fileExisted = false;
         var defaults = Fallback;
         if (string.IsNullOrWhiteSpace(path) || !File.Exists(path))
+        {
+            status = NestDefaultsStatus.Missing;
             return defaults;
-
+        }
-        fileExisted = true;
 
         NestDefaultsDto? dto;
         try
@@ -77,15 +90,22 @@ public sealed class NestDefaults
         }
         catch (JsonException)
         {
+            status = NestDefaultsStatus.Invalid;
             return defaults;
         }
         catch (IOException)
         {
+            status = NestDefaultsStatus.Invalid;
             return defaults;
         }
 
         if (dto is null)
+        {
+            status = NestDefaultsStatus.Invalid;
             return defaults;
+        }
+
+        status = NestDefaultsStatus.Ok;
 
         if (
             dto.Units is not null
@@ -138,6 +158,23 @@ public sealed class NestDefaults
         };
     }
 
+    /// <summary>
+    /// Captures defaults from an existing plate (a copy of its size,
+    /// quadrant, and spacing), e.g. the active plate in the desktop app.
+    /// </summary>
+    public static NestDefaults FromPlate(Units units, Plate plate)
+    {
+        ArgumentNullException.ThrowIfNull(plate);
+        return new NestDefaults
+        {
+            Units = units,
+            Size = plate.Size,
+            Quadrant = plate.Quadrant,
+            PartSpacing = plate.PartSpacing,
+            EdgeSpacing = plate.EdgeSpacing,
+        };
+    }
+
     public void ApplyTo(Nest nest)
     {
         ArgumentNullException.ThrowIfNull(nest);

OpenNest.Tests/Data/NestDefaultsTests.cs

@@ -34,9 +34,9 @@ public class NestDefaultsTests : IDisposable
         };
 
         original.Save(_path);
-        var loaded = NestDefaults.Load(_path, out var loadedFromDisk);
+        var loaded = NestDefaults.Load(_path, out var status);
 
-        Assert.True(loadedFromDisk);
+        Assert.Equal(NestDefaultsStatus.Ok, status);
         Assert.Equal(Units.Millimeters, loaded.Units);
         Assert.Equal(original.Size, loaded.Size);
         Assert.Equal(3, loaded.Quadrant);
@@ -58,20 +58,20 @@ public class NestDefaultsTests : IDisposable
     [Fact]
     public void Load_MissingFile_ReturnsFallback()
     {
-        var loaded = NestDefaults.Load(_path, out var loadedFromDisk);
+        var loaded = NestDefaults.Load(_path, out var status);
 
-        Assert.False(loadedFromDisk);
+        Assert.Equal(NestDefaultsStatus.Missing, status);
         AssertFallback(loaded);
     }
 
     [Fact]
-    public void Load_CorruptJson_ReturnsFallbackButReportsFile()
+    public void Load_CorruptJson_ReturnsFallbackButReportsInvalid()
     {
         File.WriteAllText(_path, "{ this is not json");
 
-        var loaded = NestDefaults.Load(_path, out var loadedFromDisk);
+        var loaded = NestDefaults.Load(_path, out var status);
 
-        Assert.True(loadedFromDisk);
+        Assert.Equal(NestDefaultsStatus.Invalid, status);
         AssertFallback(loaded);
     }
 
@@ -80,9 +80,9 @@ public class NestDefaultsTests : IDisposable
     {
         File.WriteAllText(_path, """{ "units": "millimeters", "partSpacing": 4 }""");
 
-        var loaded = NestDefaults.Load(_path, out var loadedFromDisk);
+        var loaded = NestDefaults.Load(_path, out var status);
 
-        Assert.True(loadedFromDisk);
+        Assert.Equal(NestDefaultsStatus.Ok, status);
         Assert.Equal(Units.Millimeters, loaded.Units);
         Assert.Equal(4, loaded.PartSpacing);
         // Untouched fields keep fallback values.
@@ -107,9 +107,10 @@ public class NestDefaultsTests : IDisposable
             """
         );
 
-        var loaded = NestDefaults.Load(_path, out var loadedFromDisk);
+        var loaded = NestDefaults.Load(_path, out var status);
 
-        Assert.True(loadedFromDisk);
+        // The file parses; only the invalid values fall back, so no warning.
+        Assert.Equal(NestDefaultsStatus.Ok, status);
         Assert.Equal(Units.Inches, loaded.Units);
         Assert.Equal(new Size(100, 100), loaded.Size);
         Assert.Equal(1, loaded.Quadrant);
@@ -144,9 +145,9 @@ public class NestDefaultsTests : IDisposable
             """
         );
 
-        var loaded = NestDefaults.Load(_path, out var loadedFromDisk);
+        var loaded = NestDefaults.Load(_path, out var status);
 
-        Assert.True(loadedFromDisk);
+        Assert.Equal(NestDefaultsStatus.Ok, status);
         Assert.Equal(2, loaded.PartSpacing);
     }
 

OpenNest/Forms/BomImportForm.cs

@@ -5,6 +5,7 @@ using System.Drawing;
 using System.IO;
 using System.Linq;
 using System.Windows.Forms;
+using OpenNest.Data;
 using OpenNest.Geometry;
 using OpenNest.IO;
 using OpenNest.IO.Bom;
@@ -16,7 +17,7 @@ namespace OpenNest.Forms
         private List<BomPartRow> _parts;
         private Dictionary<string, GroupSettings> _groupSettings;
         private bool _suppressRegroup;
-        private Nest.PlateSettings _templateDefaults;
+        private NestDefaults _defaults;
 
         public Form MdiParentForm { get; set; }
 
@@ -25,37 +26,14 @@ namespace OpenNest.Forms
             InitializeComponent();
             _parts = new List<BomPartRow>();
             _groupSettings = new Dictionary<string, GroupSettings>();
-            _templateDefaults = LoadTemplateDefaults();
+            _defaults = NestDefaults.Load(NestDefaults.DefaultPath);
-            ApplyTemplateDefaults();
+            ApplyDefaults();
         }
 
-        private Nest.PlateSettings LoadTemplateDefaults()
+        private void ApplyDefaults()
         {
-            var templatePath = Properties.Settings.Default.NestTemplatePath;
+            txtPlateWidth.Text = _defaults.Size.Width.ToString("0.####");
-            if (File.Exists(templatePath))
+            txtPlateLength.Text = _defaults.Size.Length.ToString("0.####");
-            {
-                try
-                {
-                    var nest = new NestReader(templatePath).Read();
-                    return nest.PlateDefaults;
-                }
-                catch { }
-            }
-
-            // Fallback defaults matching CreateDefaultNest
-            return new Nest.PlateSettings
-            {
-                Size = new Geometry.Size(100, 100),
-                Quadrant = 1,
-                PartSpacing = 1,
-                EdgeSpacing = new Spacing(1, 1, 1, 1),
-            };
-        }
-
-        private void ApplyTemplateDefaults()
-        {
-            txtPlateWidth.Text = _templateDefaults.Size.Width.ToString("0.####");
-            txtPlateLength.Text = _templateDefaults.Size.Length.ToString("0.####");
         }
 
         #region File Browsing
@@ -147,9 +125,9 @@ namespace OpenNest.Forms
             var matchedPaths = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
 
             foreach (var group in analysis.Groups)
-            foreach (var part in group.Parts)
+                foreach (var part in group.Parts)
-                if (part.DxfPath != null)
+                    if (part.DxfPath != null)
-                    matchedPaths[part.Item.FileName ?? ""] = part.DxfPath;
+                        matchedPaths[part.Item.FileName ?? ""] = part.DxfPath;
 
             _parts = new List<BomPartRow>();
 
@@ -290,10 +268,10 @@ namespace OpenNest.Forms
 
             var defaultWidth = double.TryParse(txtPlateWidth.Text, out var w)
                 ? w
-                : _templateDefaults.Size.Width;
+                : _defaults.Size.Width;
             var defaultLength = double.TryParse(txtPlateLength.Text, out var l)
                 ? l
-                : _templateDefaults.Size.Length;
+                : _defaults.Size.Length;
 
             var groups = _parts
                 .Where(p =>
@@ -336,11 +314,11 @@ namespace OpenNest.Forms
                     group.Sum(p => p.Qty ?? 0),
                     existing ? gs.PlateWidth : defaultWidth,
                     existing ? gs.PlateLength : defaultLength,
-                    existing ? gs.PartSpacing : _templateDefaults.PartSpacing,
+                    existing ? gs.PartSpacing : _defaults.PartSpacing,
-                    existing ? gs.EdgeLeft : _templateDefaults.EdgeSpacing.Left,
+                    existing ? gs.EdgeLeft : _defaults.EdgeSpacing.Left,
-                    existing ? gs.EdgeBottom : _templateDefaults.EdgeSpacing.Bottom,
+                    existing ? gs.EdgeBottom : _defaults.EdgeSpacing.Bottom,
-                    existing ? gs.EdgeRight : _templateDefaults.EdgeSpacing.Right,
+                    existing ? gs.EdgeRight : _defaults.EdgeSpacing.Right,
-                    existing ? gs.EdgeTop : _templateDefaults.EdgeSpacing.Top
+                    existing ? gs.EdgeTop : _defaults.EdgeSpacing.Top
                 );
             }
 
@@ -374,23 +352,23 @@ namespace OpenNest.Forms
                 {
                     PlateWidth = row["Plate Width"] is double pw
                         ? pw
-                        : _templateDefaults.Size.Width,
+                        : _defaults.Size.Width,
                     PlateLength = row["Plate Length"] is double pl
                         ? pl
-                        : _templateDefaults.Size.Length,
+                        : _defaults.Size.Length,
                     PartSpacing = row["Part Spacing"] is double ps
                         ? ps
-                        : _templateDefaults.PartSpacing,
+                        : _defaults.PartSpacing,
                     EdgeLeft = row["Edge Left"] is double el
                         ? el
-                        : _templateDefaults.EdgeSpacing.Left,
+                        : _defaults.EdgeSpacing.Left,
                     EdgeBottom = row["Edge Bottom"] is double eb
                         ? eb
-                        : _templateDefaults.EdgeSpacing.Bottom,
+                        : _defaults.EdgeSpacing.Bottom,
                     EdgeRight = row["Edge Right"] is double er
                         ? er
-                        : _templateDefaults.EdgeSpacing.Right,
+                        : _defaults.EdgeSpacing.Right,
-                    EdgeTop = row["Edge Top"] is double et ? et : _templateDefaults.EdgeSpacing.Top,
+                    EdgeTop = row["Edge Top"] is double et ? et : _defaults.EdgeSpacing.Top,
                 };
             }
         }
@@ -434,10 +412,10 @@ namespace OpenNest.Forms
 
             var defaultWidth = double.TryParse(txtPlateWidth.Text, out var dw)
                 ? dw
-                : _templateDefaults.Size.Width;
+                : _defaults.Size.Width;
             var defaultLength = double.TryParse(txtPlateLength.Text, out var dl)
                 ? dl
-                : _templateDefaults.Size.Length;
+                : _defaults.Size.Length;
 
             var groups = _parts
                 .Where(p =>
@@ -477,11 +455,11 @@ namespace OpenNest.Forms
                 var hasSettings = _groupSettings.TryGetValue(key, out var gs);
                 var plateWidth = hasSettings ? gs.PlateWidth : defaultWidth;
                 var plateLength = hasSettings ? gs.PlateLength : defaultLength;
-                var partSpacing = hasSettings ? gs.PartSpacing : _templateDefaults.PartSpacing;
+                var partSpacing = hasSettings ? gs.PartSpacing : _defaults.PartSpacing;
-                var edgeLeft = hasSettings ? gs.EdgeLeft : _templateDefaults.EdgeSpacing.Left;
+                var edgeLeft = hasSettings ? gs.EdgeLeft : _defaults.EdgeSpacing.Left;
-                var edgeBottom = hasSettings ? gs.EdgeBottom : _templateDefaults.EdgeSpacing.Bottom;
+                var edgeBottom = hasSettings ? gs.EdgeBottom : _defaults.EdgeSpacing.Bottom;
-                var edgeRight = hasSettings ? gs.EdgeRight : _templateDefaults.EdgeSpacing.Right;
+                var edgeRight = hasSettings ? gs.EdgeRight : _defaults.EdgeSpacing.Right;
-                var edgeTop = hasSettings ? gs.EdgeTop : _templateDefaults.EdgeSpacing.Top;
+                var edgeTop = hasSettings ? gs.EdgeTop : _defaults.EdgeSpacing.Top;
 
                 var nestName = $"{jobName} - {thickness:0.###} {material}";
                 var nest = new Nest(nestName);
@@ -490,7 +468,7 @@ namespace OpenNest.Forms
                 nest.PlateDefaults.Size = new Geometry.Size(plateWidth, plateLength);
                 nest.Thickness = thickness;
                 nest.Material = new Material(material);
-                nest.PlateDefaults.Quadrant = _templateDefaults.Quadrant;
+                nest.PlateDefaults.Quadrant = _defaults.Quadrant;
                 nest.PlateDefaults.PartSpacing = partSpacing;
                 nest.PlateDefaults.EdgeSpacing = new Spacing(
                     edgeLeft,

OpenNest/Forms/EditNestForm.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.ComponentModel;
 using System.Diagnostics;
 using System.Drawing;
@@ -301,16 +301,11 @@ namespace OpenNest.Forms
         public void SaveAs()
         {
             var dlg = new SaveFileDialog();
-            dlg.Filter = $"{NestFormat.FileFilter}|Template File|*.nstdot";
+            dlg.Filter = NestFormat.FileFilter;
             dlg.FileName = Nest.Name;
 
             if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
-            {
+                SaveAs(dlg.FileName);
-                if (dlg.FilterIndex == 2)
-                    SaveTemplate(dlg.FileName);
-                else
-                    SaveAs(dlg.FileName);
-            }
         }
 
         public void SaveAs(string path)
@@ -319,17 +314,6 @@ namespace OpenNest.Forms
             Text = Document.Name;
         }
 
-        public void SaveTemplate(string path)
-        {
-            var nst = new Nest();
-            nst.Name = Path.GetFileNameWithoutExtension(path);
-            nst.PlateDefaults = Nest.PlateDefaults;
-            nst.Units = Nest.Units;
-
-            var writer = new NestWriter(nst);
-            writer.Write(path);
-        }
-
         public void Import()
         {
             var dlg = new OpenFileDialog();
@@ -943,9 +927,9 @@ namespace OpenNest.Forms
 
             // Refresh all parts to use the updated programs
             foreach (var plate in Nest.Plates)
-            foreach (var part in plate.Parts)
+                foreach (var part in plate.Parts)
-                if (!part.BaseDrawing.IsCutOff)
+                    if (!part.BaseDrawing.IsCutOff)
-                    part.Update();
+                        part.Update();
 
             UpdateDrawingList();
             PlateView.Invalidate();

OpenNest/Forms/MainForm.Designer.cs

@@ -82,6 +82,8 @@
             mnuSetRotationIncrement = new System.Windows.Forms.ToolStripMenuItem();
             toolStripMenuItem15 = new System.Windows.Forms.ToolStripSeparator();
             mnuToolsMachineConfig = new System.Windows.Forms.ToolStripMenuItem();
+            mnuToolsNestDefaults = new System.Windows.Forms.ToolStripMenuItem();
+            mnuToolsSaveCurrentAsDefaults = new System.Windows.Forms.ToolStripMenuItem();
             mnuToolsOptions = new System.Windows.Forms.ToolStripMenuItem();
             mnuNest = new System.Windows.Forms.ToolStripMenuItem();
             mnuNestEdit = new System.Windows.Forms.ToolStripMenuItem();
@@ -420,7 +422,7 @@
             // 
             // mnuTools
             // 
-            mnuTools.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] { mnuToolsMeasureArea, mnuToolsBestFitViewer, mnuToolsPatternTile, mnuToolsExpandSpacing, mnuToolsAlign, toolStripMenuItem14, mnuSetOffsetIncrement, mnuSetRotationIncrement, toolStripMenuItem15, mnuToolsMachineConfig, mnuToolsOptions });
+            mnuTools.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] { mnuToolsMeasureArea, mnuToolsBestFitViewer, mnuToolsPatternTile, mnuToolsExpandSpacing, mnuToolsAlign, toolStripMenuItem14, mnuSetOffsetIncrement, mnuSetRotationIncrement, toolStripMenuItem15, mnuToolsMachineConfig, mnuToolsNestDefaults, mnuToolsSaveCurrentAsDefaults, mnuToolsOptions });
             mnuTools.Name = "mnuTools";
             mnuTools.Size = new System.Drawing.Size(47, 20);
             mnuTools.Text = "&Tools";
@@ -559,6 +561,20 @@
             mnuToolsMachineConfig.Text = "Machine Configuration...";
             mnuToolsMachineConfig.Click += MachineConfig_Click;
             //
+            // mnuToolsNestDefaults
+            //
+            mnuToolsNestDefaults.Name = "mnuToolsNestDefaults";
+            mnuToolsNestDefaults.Size = new System.Drawing.Size(214, 22);
+            mnuToolsNestDefaults.Text = "Nest Defaults...";
+            mnuToolsNestDefaults.Click += NestDefaults_Click;
+            //
+            // mnuToolsSaveCurrentAsDefaults
+            //
+            mnuToolsSaveCurrentAsDefaults.Name = "mnuToolsSaveCurrentAsDefaults";
+            mnuToolsSaveCurrentAsDefaults.Size = new System.Drawing.Size(214, 22);
+            mnuToolsSaveCurrentAsDefaults.Text = "Save Current Plate as Defaults";
+            mnuToolsSaveCurrentAsDefaults.Click += SaveCurrentAsDefaults_Click;
+            //
             // mnuToolsOptions
             //
             mnuToolsOptions.Name = "mnuToolsOptions";
@@ -1225,6 +1241,8 @@
         private System.Windows.Forms.ToolStripSeparator toolStripMenuItem5;
         private System.Windows.Forms.ToolStripMenuItem mnuTools;
         private System.Windows.Forms.ToolStripMenuItem mnuToolsMachineConfig;
+        private System.Windows.Forms.ToolStripMenuItem mnuToolsNestDefaults;
+        private System.Windows.Forms.ToolStripMenuItem mnuToolsSaveCurrentAsDefaults;
         private System.Windows.Forms.ToolStripMenuItem mnuToolsOptions;
         private System.Windows.Forms.ToolStripMenuItem mnuNest;
         private System.Windows.Forms.ToolStripMenuItem mnuNestEdit;

OpenNest/Forms/MainForm.cs

@@ -90,14 +90,38 @@ namespace OpenNest.Forms
         private Nest CreateDefaultNest()
         {
             var nest = new Nest();
-            nest.Units = Properties.Settings.Default.DefaultUnit;
+            LoadNestDefaults().ApplyTo(nest);
-            nest.PlateDefaults.EdgeSpacing = new Spacing(1, 1, 1, 1);
-            nest.PlateDefaults.PartSpacing = 1;
-            nest.PlateDefaults.Size = new OpenNest.Geometry.Size(100, 100);
-            nest.PlateDefaults.Quadrant = 1;
             return nest;
         }
 
+        /// <summary>
+        /// Loads the persisted nest defaults. When no usable file exists,
+        /// units come from the legacy DefaultUnit setting; a corrupt file
+        /// warns once per session.
+        /// </summary>
+        private NestDefaults LoadNestDefaults()
+        {
+            var defaults = NestDefaults.Load(NestDefaults.DefaultPath, out var status);
+            if (status == NestDefaultsStatus.Ok)
+                return defaults;
+
+            defaults.Units = Properties.Settings.Default.DefaultUnit;
+
+            if (status == NestDefaultsStatus.Invalid && !defaultsWarned)
+            {
+                defaultsWarned = true;
+                MessageBox.Show(
+                    $"The nest defaults file could not be read:\n{NestDefaults.DefaultPath}\n\nBuilt-in defaults will be used. Re-save your defaults from Tools > Nest Defaults.",
+                    "Nest Defaults",
+                    MessageBoxButtons.OK,
+                    MessageBoxIcon.Warning
+                );
+            }
+            return defaults;
+        }
+
+        private bool defaultsWarned;
+
         private string GetNestName(DateTime date, int id)
         {
             var year = (date.Year % 100).ToString("D2");
@@ -185,6 +209,7 @@ namespace OpenNest.Forms
             mnuToolsAlign.Visible = hasValue;
             mnuToolsMeasureArea.Visible = hasValue;
             mnuToolsExpandSpacing.Visible = hasValue;
+            mnuToolsSaveCurrentAsDefaults.Visible = hasValue;
 
             toolStripMenuItem14.Visible = hasValue;
             mnuSetOffsetIncrement.Visible = hasValue;
@@ -454,10 +479,52 @@ namespace OpenNest.Forms
         {
             base.OnLoad(e);
 
+            MigrateNestTemplate();
+
             if (Settings.Default.CreateNewNestOnOpen)
                 New_Click(this, new EventArgs());
         }
 
+        /// <summary>
+        /// One-time upgrade: converts a legacy .nstdot nest template
+        /// (NestTemplatePath setting) into defaults.json, then clears the
+        /// setting so the template mechanism is never consulted again.
+        /// </summary>
+        private void MigrateNestTemplate()
+        {
+            var templatePath = Settings.Default.NestTemplatePath;
+            if (string.IsNullOrWhiteSpace(templatePath))
+                return;
+
+            // A failed conversion keeps the setting populated so the user
+            // can still find their template file.
+            var converted = true;
+            if (File.Exists(templatePath) && !File.Exists(NestDefaults.DefaultPath))
+            {
+                try
+                {
+                    var nest = new NestReader(templatePath).Read();
+                    NestDefaults.FromNest(nest).Save(NestDefaults.DefaultPath);
+                }
+                catch (Exception ex)
+                {
+                    converted = false;
+                    MessageBox.Show(
+                        $"The nest template could not be converted to the new defaults file:\n{templatePath}\n\n{ex.Message}\n\nIt will no longer be loaded automatically. Set defaults under Tools > Nest Defaults.",
+                        "Nest Template",
+                        MessageBoxButtons.OK,
+                        MessageBoxIcon.Warning
+                    );
+                }
+            }
+
+            if (!converted)
+                return;
+
+            Settings.Default.NestTemplatePath = "";
+            Settings.Default.Save();
+        }
+
         protected override void OnClosing(System.ComponentModel.CancelEventArgs e)
         {
             base.OnClosing(e);
@@ -473,30 +540,7 @@ namespace OpenNest.Forms
             var windowState =
                 ActiveMdiChild != null ? ActiveMdiChild.WindowState : FormWindowState.Maximized;
 
-            Nest nest;
+            var nest = CreateDefaultNest();
-
-            if (File.Exists(Properties.Settings.Default.NestTemplatePath))
-            {
-                try
-                {
-                    var reader = new NestReader(Properties.Settings.Default.NestTemplatePath);
-                    nest = reader.Read();
-                }
-                catch (Exception ex)
-                {
-                    MessageBox.Show(
-                        $"Failed to load nest template:\n{ex.Message}\n\nA default nest will be created instead.",
-                        "Template Error",
-                        MessageBoxButtons.OK,
-                        MessageBoxIcon.Warning
-                    );
-                    nest = CreateDefaultNest();
-                }
-            }
-            else
-            {
-                nest = CreateDefaultNest();
-            }
 
             nest.DateCreated = DateTime.Now;
             nest.DateLastModified = DateTime.Now;
@@ -834,6 +878,25 @@ namespace OpenNest.Forms
             form.ShowDialog();
         }
 
+        private void NestDefaults_Click(object sender, EventArgs e)
+        {
+            using (var form = new NestDefaultsForm(NestDefaults.Load(NestDefaults.DefaultPath)))
+            {
+                if (form.ShowDialog(this) == DialogResult.OK)
+                    form.GetDefaults().Save(NestDefaults.DefaultPath);
+            }
+        }
+
+        private void SaveCurrentAsDefaults_Click(object sender, EventArgs e)
+        {
+            if (activeForm == null)
+                return;
+
+            NestDefaults
+                .FromPlate(activeForm.Nest.Units, activeForm.PlateView.Plate)
+                .Save(NestDefaults.DefaultPath);
+        }
+
         private void MachineConfig_Click(object sender, EventArgs e)
         {
             var appDataPath = Path.Combine(

OpenNest/Forms/NestDefaultsForm.Designer.cs

@@ -0,0 +1,364 @@
+namespace OpenNest.Forms
+{
+    partial class NestDefaultsForm
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            this.tableLayoutPanel1 = new System.Windows.Forms.TableLayoutPanel();
+            this.unitsLabel = new System.Windows.Forms.Label();
+            this.unitsCombo = new System.Windows.Forms.ComboBox();
+            this.widthLabel = new System.Windows.Forms.Label();
+            this.widthBox = new OpenNest.Controls.NumericUpDown();
+            this.lengthLabel = new System.Windows.Forms.Label();
+            this.lengthBox = new OpenNest.Controls.NumericUpDown();
+            this.partSpacingLabel = new System.Windows.Forms.Label();
+            this.partSpacingBox = new OpenNest.Controls.NumericUpDown();
+            this.edgeLeftLabel = new System.Windows.Forms.Label();
+            this.edgeLeftBox = new OpenNest.Controls.NumericUpDown();
+            this.edgeBottomLabel = new System.Windows.Forms.Label();
+            this.edgeBottomBox = new OpenNest.Controls.NumericUpDown();
+            this.edgeRightLabel = new System.Windows.Forms.Label();
+            this.edgeRightBox = new OpenNest.Controls.NumericUpDown();
+            this.edgeTopLabel = new System.Windows.Forms.Label();
+            this.edgeTopBox = new OpenNest.Controls.NumericUpDown();
+            this.quadrantLabel = new System.Windows.Forms.Label();
+            this.quadrantSelect1 = new OpenNest.Controls.QuadrantSelect();
+            this.saveButton = new System.Windows.Forms.Button();
+            this.cancelButton = new System.Windows.Forms.Button();
+            ((System.ComponentModel.ISupportInitialize)(this.widthBox)).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)(this.lengthBox)).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)(this.partSpacingBox)).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)(this.edgeLeftBox)).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)(this.edgeBottomBox)).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)(this.edgeRightBox)).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)(this.edgeTopBox)).BeginInit();
+            this.tableLayoutPanel1.SuspendLayout();
+            this.SuspendLayout();
+            //
+            // tableLayoutPanel1
+            //
+            this.tableLayoutPanel1.ColumnCount = 2;
+            this.tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle());
+            this.tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 100F));
+            this.tableLayoutPanel1.Controls.Add(this.unitsLabel, 0, 0);
+            this.tableLayoutPanel1.Controls.Add(this.unitsCombo, 1, 0);
+            this.tableLayoutPanel1.Controls.Add(this.widthLabel, 0, 1);
+            this.tableLayoutPanel1.Controls.Add(this.widthBox, 1, 1);
+            this.tableLayoutPanel1.Controls.Add(this.lengthLabel, 0, 2);
+            this.tableLayoutPanel1.Controls.Add(this.lengthBox, 1, 2);
+            this.tableLayoutPanel1.Controls.Add(this.partSpacingLabel, 0, 3);
+            this.tableLayoutPanel1.Controls.Add(this.partSpacingBox, 1, 3);
+            this.tableLayoutPanel1.Controls.Add(this.edgeLeftLabel, 0, 4);
+            this.tableLayoutPanel1.Controls.Add(this.edgeLeftBox, 1, 4);
+            this.tableLayoutPanel1.Controls.Add(this.edgeBottomLabel, 0, 5);
+            this.tableLayoutPanel1.Controls.Add(this.edgeBottomBox, 1, 5);
+            this.tableLayoutPanel1.Controls.Add(this.edgeRightLabel, 0, 6);
+            this.tableLayoutPanel1.Controls.Add(this.edgeRightBox, 1, 6);
+            this.tableLayoutPanel1.Controls.Add(this.edgeTopLabel, 0, 7);
+            this.tableLayoutPanel1.Controls.Add(this.edgeTopBox, 1, 7);
+            this.tableLayoutPanel1.Controls.Add(this.quadrantLabel, 0, 8);
+            this.tableLayoutPanel1.Controls.Add(this.quadrantSelect1, 1, 8);
+            this.tableLayoutPanel1.Location = new System.Drawing.Point(12, 12);
+            this.tableLayoutPanel1.Name = "tableLayoutPanel1";
+            this.tableLayoutPanel1.RowCount = 9;
+            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 11.11111F));
+            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 11.11111F));
+            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 11.11111F));
+            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 11.11111F));
+            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 11.11111F));
+            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 11.11111F));
+            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 11.11111F));
+            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 11.11111F));
+            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 11.11111F));
+            this.tableLayoutPanel1.Size = new System.Drawing.Size(410, 260);
+            this.tableLayoutPanel1.TabIndex = 0;
+            //
+            // unitsLabel
+            //
+            this.unitsLabel.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
+            this.unitsLabel.AutoSize = true;
+            this.unitsLabel.Location = new System.Drawing.Point(3, 9);
+            this.unitsLabel.Name = "unitsLabel";
+            this.unitsLabel.Size = new System.Drawing.Size(100, 16);
+            this.unitsLabel.TabIndex = 0;
+            this.unitsLabel.Text = "Units:";
+            //
+            // unitsCombo
+            //
+            this.unitsCombo.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
+            this.unitsCombo.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
+            this.unitsCombo.Items.AddRange(new object[] { "Inches", "Millimeters" });
+            this.unitsCombo.Location = new System.Drawing.Point(109, 5);
+            this.unitsCombo.Name = "unitsCombo";
+            this.unitsCombo.Size = new System.Drawing.Size(298, 24);
+            this.unitsCombo.TabIndex = 1;
+            //
+            // widthLabel
+            //
+            this.widthLabel.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
+            this.widthLabel.AutoSize = true;
+            this.widthLabel.Location = new System.Drawing.Point(3, 37);
+            this.widthLabel.Name = "widthLabel";
+            this.widthLabel.Size = new System.Drawing.Size(100, 16);
+            this.widthLabel.TabIndex = 2;
+            this.widthLabel.Text = "Plate width:";
+            //
+            // widthBox
+            //
+            this.widthBox.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
+            this.widthBox.DecimalPlaces = 4;
+            this.widthBox.Location = new System.Drawing.Point(109, 33);
+            this.widthBox.Maximum = new decimal(new int[] { 1000000, 0, 0, 0 });
+            this.widthBox.Minimum = new decimal(new int[] { 1, 0, 0, 196608 });
+            this.widthBox.Name = "widthBox";
+            this.widthBox.Size = new System.Drawing.Size(298, 22);
+            this.widthBox.Suffix = "";
+            this.widthBox.TabIndex = 3;
+            //
+            // lengthLabel
+            //
+            this.lengthLabel.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
+            this.lengthLabel.AutoSize = true;
+            this.lengthLabel.Location = new System.Drawing.Point(3, 65);
+            this.lengthLabel.Name = "lengthLabel";
+            this.lengthLabel.Size = new System.Drawing.Size(100, 16);
+            this.lengthLabel.TabIndex = 4;
+            this.lengthLabel.Text = "Plate length:";
+            //
+            // lengthBox
+            //
+            this.lengthBox.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
+            this.lengthBox.DecimalPlaces = 4;
+            this.lengthBox.Location = new System.Drawing.Point(109, 61);
+            this.lengthBox.Maximum = new decimal(new int[] { 1000000, 0, 0, 0 });
+            this.lengthBox.Minimum = new decimal(new int[] { 1, 0, 0, 196608 });
+            this.lengthBox.Name = "lengthBox";
+            this.lengthBox.Size = new System.Drawing.Size(298, 22);
+            this.lengthBox.Suffix = "";
+            this.lengthBox.TabIndex = 5;
+            //
+            // partSpacingLabel
+            //
+            this.partSpacingLabel.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
+            this.partSpacingLabel.AutoSize = true;
+            this.partSpacingLabel.Location = new System.Drawing.Point(3, 93);
+            this.partSpacingLabel.Name = "partSpacingLabel";
+            this.partSpacingLabel.Size = new System.Drawing.Size(100, 16);
+            this.partSpacingLabel.TabIndex = 6;
+            this.partSpacingLabel.Text = "Part spacing:";
+            //
+            // partSpacingBox
+            //
+            this.partSpacingBox.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
+            this.partSpacingBox.DecimalPlaces = 4;
+            this.partSpacingBox.Location = new System.Drawing.Point(109, 89);
+            this.partSpacingBox.Maximum = new decimal(new int[] { 1000000, 0, 0, 0 });
+            this.partSpacingBox.Name = "partSpacingBox";
+            this.partSpacingBox.Size = new System.Drawing.Size(298, 22);
+            this.partSpacingBox.Suffix = "";
+            this.partSpacingBox.TabIndex = 7;
+            //
+            // edgeLeftLabel
+            //
+            this.edgeLeftLabel.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
+            this.edgeLeftLabel.AutoSize = true;
+            this.edgeLeftLabel.Location = new System.Drawing.Point(3, 121);
+            this.edgeLeftLabel.Name = "edgeLeftLabel";
+            this.edgeLeftLabel.Size = new System.Drawing.Size(100, 16);
+            this.edgeLeftLabel.TabIndex = 8;
+            this.edgeLeftLabel.Text = "Edge left:";
+            //
+            // edgeLeftBox
+            //
+            this.edgeLeftBox.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
+            this.edgeLeftBox.DecimalPlaces = 4;
+            this.edgeLeftBox.Location = new System.Drawing.Point(109, 117);
+            this.edgeLeftBox.Maximum = new decimal(new int[] { 1000000, 0, 0, 0 });
+            this.edgeLeftBox.Name = "edgeLeftBox";
+            this.edgeLeftBox.Size = new System.Drawing.Size(298, 22);
+            this.edgeLeftBox.Suffix = "";
+            this.edgeLeftBox.TabIndex = 9;
+            //
+            // edgeBottomLabel
+            //
+            this.edgeBottomLabel.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
+            this.edgeBottomLabel.AutoSize = true;
+            this.edgeBottomLabel.Location = new System.Drawing.Point(3, 149);
+            this.edgeBottomLabel.Name = "edgeBottomLabel";
+            this.edgeBottomLabel.Size = new System.Drawing.Size(100, 16);
+            this.edgeBottomLabel.TabIndex = 10;
+            this.edgeBottomLabel.Text = "Edge bottom:";
+            //
+            // edgeBottomBox
+            //
+            this.edgeBottomBox.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
+            this.edgeBottomBox.DecimalPlaces = 4;
+            this.edgeBottomBox.Location = new System.Drawing.Point(109, 145);
+            this.edgeBottomBox.Maximum = new decimal(new int[] { 1000000, 0, 0, 0 });
+            this.edgeBottomBox.Name = "edgeBottomBox";
+            this.edgeBottomBox.Size = new System.Drawing.Size(298, 22);
+            this.edgeBottomBox.Suffix = "";
+            this.edgeBottomBox.TabIndex = 11;
+            //
+            // edgeRightLabel
+            //
+            this.edgeRightLabel.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
+            this.edgeRightLabel.AutoSize = true;
+            this.edgeRightLabel.Location = new System.Drawing.Point(3, 177);
+            this.edgeRightLabel.Name = "edgeRightLabel";
+            this.edgeRightLabel.Size = new System.Drawing.Size(100, 16);
+            this.edgeRightLabel.TabIndex = 12;
+            this.edgeRightLabel.Text = "Edge right:";
+            //
+            // edgeRightBox
+            //
+            this.edgeRightBox.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
+            this.edgeRightBox.DecimalPlaces = 4;
+            this.edgeRightBox.Location = new System.Drawing.Point(109, 173);
+            this.edgeRightBox.Maximum = new decimal(new int[] { 1000000, 0, 0, 0 });
+            this.edgeRightBox.Name = "edgeRightBox";
+            this.edgeRightBox.Size = new System.Drawing.Size(298, 22);
+            this.edgeRightBox.Suffix = "";
+            this.edgeRightBox.TabIndex = 13;
+            //
+            // edgeTopLabel
+            //
+            this.edgeTopLabel.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
+            this.edgeTopLabel.AutoSize = true;
+            this.edgeTopLabel.Location = new System.Drawing.Point(3, 205);
+            this.edgeTopLabel.Name = "edgeTopLabel";
+            this.edgeTopLabel.Size = new System.Drawing.Size(100, 16);
+            this.edgeTopLabel.TabIndex = 14;
+            this.edgeTopLabel.Text = "Edge top:";
+            //
+            // edgeTopBox
+            //
+            this.edgeTopBox.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
+            this.edgeTopBox.DecimalPlaces = 4;
+            this.edgeTopBox.Location = new System.Drawing.Point(109, 201);
+            this.edgeTopBox.Maximum = new decimal(new int[] { 1000000, 0, 0, 0 });
+            this.edgeTopBox.Name = "edgeTopBox";
+            this.edgeTopBox.Size = new System.Drawing.Size(298, 22);
+            this.edgeTopBox.Suffix = "";
+            this.edgeTopBox.TabIndex = 15;
+            //
+            // quadrantLabel
+            //
+            this.quadrantLabel.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
+            this.quadrantLabel.AutoSize = true;
+            this.quadrantLabel.Location = new System.Drawing.Point(3, 233);
+            this.quadrantLabel.Name = "quadrantLabel";
+            this.quadrantLabel.Size = new System.Drawing.Size(100, 16);
+            this.quadrantLabel.TabIndex = 16;
+            this.quadrantLabel.Text = "Quadrant:";
+            //
+            // quadrantSelect1
+            //
+            this.quadrantSelect1.Anchor = System.Windows.Forms.AnchorStyles.None;
+            this.quadrantSelect1.BackColor = System.Drawing.Color.White;
+            this.quadrantSelect1.Location = new System.Drawing.Point(198, 225);
+            this.quadrantSelect1.Name = "quadrantSelect1";
+            this.quadrantSelect1.Quadrant = 1;
+            this.quadrantSelect1.Size = new System.Drawing.Size(120, 28);
+            this.quadrantSelect1.TabIndex = 17;
+            //
+            // saveButton
+            //
+            this.saveButton.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
+            this.saveButton.DialogResult = System.Windows.Forms.DialogResult.OK;
+            this.saveButton.Location = new System.Drawing.Point(243, 285);
+            this.saveButton.Name = "saveButton";
+            this.saveButton.Size = new System.Drawing.Size(90, 28);
+            this.saveButton.TabIndex = 1;
+            this.saveButton.Text = "Save";
+            this.saveButton.UseVisualStyleBackColor = true;
+            //
+            // cancelButton
+            //
+            this.cancelButton.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
+            this.cancelButton.DialogResult = System.Windows.Forms.DialogResult.Cancel;
+            this.cancelButton.Location = new System.Drawing.Point(339, 285);
+            this.cancelButton.Name = "cancelButton";
+            this.cancelButton.Size = new System.Drawing.Size(90, 28);
+            this.cancelButton.TabIndex = 2;
+            this.cancelButton.Text = "Cancel";
+            this.cancelButton.UseVisualStyleBackColor = true;
+            //
+            // NestDefaultsForm
+            //
+            this.AcceptButton = this.saveButton;
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
+            this.CancelButton = this.cancelButton;
+            this.ClientSize = new System.Drawing.Size(434, 322);
+            this.Controls.Add(this.tableLayoutPanel1);
+            this.Controls.Add(this.saveButton);
+            this.Controls.Add(this.cancelButton);
+            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
+            this.MaximizeBox = false;
+            this.MinimizeBox = false;
+            this.Name = "NestDefaultsForm";
+            this.ShowIcon = false;
+            this.ShowInTaskbar = false;
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
+            this.Text = "Nest Defaults";
+            ((System.ComponentModel.ISupportInitialize)(this.widthBox)).EndInit();
+            ((System.ComponentModel.ISupportInitialize)(this.lengthBox)).EndInit();
+            ((System.ComponentModel.ISupportInitialize)(this.partSpacingBox)).EndInit();
+            ((System.ComponentModel.ISupportInitialize)(this.edgeLeftBox)).EndInit();
+            ((System.ComponentModel.ISupportInitialize)(this.edgeBottomBox)).EndInit();
+            ((System.ComponentModel.ISupportInitialize)(this.edgeRightBox)).EndInit();
+            ((System.ComponentModel.ISupportInitialize)(this.edgeTopBox)).EndInit();
+            this.tableLayoutPanel1.ResumeLayout(false);
+            this.tableLayoutPanel1.PerformLayout();
+            this.ResumeLayout(false);
+        }
+
+        #endregion
+
+        private System.Windows.Forms.TableLayoutPanel tableLayoutPanel1;
+        private System.Windows.Forms.Label unitsLabel;
+        private System.Windows.Forms.ComboBox unitsCombo;
+        private System.Windows.Forms.Label widthLabel;
+        private OpenNest.Controls.NumericUpDown widthBox;
+        private System.Windows.Forms.Label lengthLabel;
+        private OpenNest.Controls.NumericUpDown lengthBox;
+        private System.Windows.Forms.Label partSpacingLabel;
+        private OpenNest.Controls.NumericUpDown partSpacingBox;
+        private System.Windows.Forms.Label edgeLeftLabel;
+        private OpenNest.Controls.NumericUpDown edgeLeftBox;
+        private System.Windows.Forms.Label edgeBottomLabel;
+        private OpenNest.Controls.NumericUpDown edgeBottomBox;
+        private System.Windows.Forms.Label edgeRightLabel;
+        private OpenNest.Controls.NumericUpDown edgeRightBox;
+        private System.Windows.Forms.Label edgeTopLabel;
+        private OpenNest.Controls.NumericUpDown edgeTopBox;
+        private System.Windows.Forms.Label quadrantLabel;
+        private OpenNest.Controls.QuadrantSelect quadrantSelect1;
+        private System.Windows.Forms.Button saveButton;
+        private System.Windows.Forms.Button cancelButton;
+    }
+}

OpenNest/Forms/NestDefaultsForm.cs

@@ -0,0 +1,62 @@
+using System;
+using System.Windows.Forms;
+using OpenNest.Data;
+using OpenNest.Geometry;
+
+namespace OpenNest.Forms
+{
+    /// <summary>
+    /// Edits the persisted nest defaults (Tools &gt; Nest Defaults), written
+    /// to the JSON file used when creating a new nest.
+    /// </summary>
+    public partial class NestDefaultsForm : Form
+    {
+        public NestDefaultsForm(NestDefaults defaults)
+        {
+            InitializeComponent();
+
+            unitsCombo.SelectedIndex = defaults.Units == Units.Millimeters ? 1 : 0;
+            widthBox.Value = Clamp(widthBox, defaults.Size.Width);
+            lengthBox.Value = Clamp(lengthBox, defaults.Size.Length);
+            partSpacingBox.Value = Clamp(partSpacingBox, defaults.PartSpacing);
+            edgeLeftBox.Value = Clamp(edgeLeftBox, defaults.EdgeSpacing.Left);
+            edgeBottomBox.Value = Clamp(edgeBottomBox, defaults.EdgeSpacing.Bottom);
+            edgeRightBox.Value = Clamp(edgeRightBox, defaults.EdgeSpacing.Right);
+            edgeTopBox.Value = Clamp(edgeTopBox, defaults.EdgeSpacing.Top);
+            quadrantSelect1.Quadrant = defaults.Quadrant;
+        }
+
+        public Units Units => unitsCombo.SelectedIndex == 1 ? Units.Millimeters : Units.Inches;
+
+        public NestDefaults GetDefaults()
+        {
+            return new NestDefaults
+            {
+                Units = Units,
+                Size = new Size((double)widthBox.Value, (double)lengthBox.Value),
+                Quadrant = quadrantSelect1.Quadrant,
+                PartSpacing = (double)partSpacingBox.Value,
+                EdgeSpacing = new Spacing(
+                    (double)edgeLeftBox.Value,
+                    (double)edgeBottomBox.Value,
+                    (double)edgeRightBox.Value,
+                    (double)edgeTopBox.Value
+                ),
+            };
+        }
+
+        private static decimal Clamp(NumericUpDown box, double value)
+        {
+            if (double.IsNaN(value) || double.IsInfinity(value))
+                return box.Minimum;
+
+            if (value < (double)box.Minimum)
+                return box.Minimum;
+
+            if (value > (double)box.Maximum)
+                return box.Maximum;
+
+            return (decimal)value;
+        }
+    }
+}

OpenNest/Forms/OptionsForm.Designer.cs

@@ -34,9 +34,6 @@
             this.toolTip1 = new System.Windows.Forms.ToolTip(this.components);
             this.numericUpDown1 = new OpenNest.Controls.NumericUpDown();
             this.tableLayoutPanel1 = new System.Windows.Forms.TableLayoutPanel();
-            this.textBox1 = new System.Windows.Forms.TextBox();
-            this.label3 = new System.Windows.Forms.Label();
-            this.button1 = new System.Windows.Forms.Button();
             this.saveButton = new System.Windows.Forms.Button();
             this.cancelButton = new System.Windows.Forms.Button();
             this.bottomPanel1 = new OpenNest.Controls.BottomPanel();
@@ -94,55 +91,20 @@
             this.tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 100F));
             this.tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Absolute, 297F));
             this.tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Absolute, 100F));
-            this.tableLayoutPanel1.Controls.Add(this.label1, 0, 1);
+            this.tableLayoutPanel1.Controls.Add(this.label1, 0, 0);
-            this.tableLayoutPanel1.Controls.Add(this.textBox1, 1, 0);
+            this.tableLayoutPanel1.Controls.Add(this.colorSchemeLabel, 0, 1);
-            this.tableLayoutPanel1.Controls.Add(this.label3, 0, 0);
+            this.tableLayoutPanel1.Controls.Add(this.colorSchemeCombo, 1, 1);
-            this.tableLayoutPanel1.Controls.Add(this.colorSchemeLabel, 0, 2);
+            this.tableLayoutPanel1.Controls.Add(this.checkBox1, 0, 2);
-            this.tableLayoutPanel1.Controls.Add(this.colorSchemeCombo, 1, 2);
+            this.tableLayoutPanel1.Controls.Add(this.numericUpDown1, 1, 0);
-            this.tableLayoutPanel1.Controls.Add(this.checkBox1, 0, 3);
-            this.tableLayoutPanel1.Controls.Add(this.numericUpDown1, 1, 1);
-            this.tableLayoutPanel1.Controls.Add(this.button1, 3, 0);
             this.tableLayoutPanel1.Location = new System.Drawing.Point(12, 12);
             this.tableLayoutPanel1.Name = "tableLayoutPanel1";
-            this.tableLayoutPanel1.RowCount = 4;
+            this.tableLayoutPanel1.RowCount = 3;
-            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 25F));
+            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 33.33333F));
-            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 25F));
+            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 33.33333F));
-            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 25F));
+            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 33.33333F));
-            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 25F));
             this.tableLayoutPanel1.Size = new System.Drawing.Size(684, 160);
             this.tableLayoutPanel1.TabIndex = 0;
             // 
-            // textBox1
-            // 
-            this.textBox1.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
-            this.tableLayoutPanel1.SetColumnSpan(this.textBox1, 2);
-            this.textBox1.Location = new System.Drawing.Point(154, 9);
-            this.textBox1.Name = "textBox1";
-            this.textBox1.Size = new System.Drawing.Size(427, 22);
-            this.textBox1.TabIndex = 1;
-            // 
-            // label3
-            // 
-            this.label3.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
-            this.label3.AutoSize = true;
-            this.label3.Location = new System.Drawing.Point(3, 12);
-            this.label3.Name = "label3";
-            this.label3.Size = new System.Drawing.Size(145, 16);
-            this.label3.TabIndex = 0;
-            this.label3.Text = "Nest Template Path:";
-            //
-            // button1
-            // 
-            this.button1.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Left | System.Windows.Forms.AnchorStyles.Right)));
-            this.button1.Location = new System.Drawing.Point(588, 6);
-            this.button1.Margin = new System.Windows.Forms.Padding(4);
-            this.button1.Name = "button1";
-            this.button1.Size = new System.Drawing.Size(92, 28);
-            this.button1.TabIndex = 2;
-            this.button1.Text = "Browse...";
-            this.button1.UseVisualStyleBackColor = true;
-            this.button1.Click += new System.EventHandler(this.BrowseNestTemplatePath_Click);
-            // 
             // saveButton
             // 
             this.saveButton.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
@@ -258,9 +220,6 @@
         private System.Windows.Forms.ToolTip toolTip1;
         private Controls.BottomPanel bottomPanel1;
         private System.Windows.Forms.TableLayoutPanel tableLayoutPanel1;
-        private System.Windows.Forms.TextBox textBox1;
-        private System.Windows.Forms.Label label3;
-        private System.Windows.Forms.Button button1;
         private System.Windows.Forms.DataGridView strategyGrid;
         private System.Windows.Forms.GroupBox strategyGroupBox;
         private System.Windows.Forms.Label colorSchemeLabel;

OpenNest/Forms/OptionsForm.cs

@@ -72,7 +72,6 @@ namespace OpenNest.Forms
 
         private void LoadSettings()
         {
-            textBox1.Text = Settings.Default.NestTemplatePath;
             checkBox1.Checked = Settings.Default.CreateNewNestOnOpen;
             numericUpDown1.Value = (decimal)Settings.Default.AutoSizePlateFactor;
 
@@ -92,7 +91,6 @@ namespace OpenNest.Forms
 
         private void SaveSettings()
         {
-            Settings.Default.NestTemplatePath = textBox1.Text;
             Settings.Default.CreateNewNestOnOpen = checkBox1.Checked;
             Settings.Default.AutoSizePlateFactor = (double)numericUpDown1.Value;
             Settings.Default.ActiveColorScheme =
@@ -144,14 +142,5 @@ namespace OpenNest.Forms
         {
             SaveSettings();
         }
-
-        private void BrowseNestTemplatePath_Click(object sender, EventArgs e)
-        {
-            var dlg = new OpenFileDialog();
-            dlg.Filter = "Template File|*.nstdot";
-
-            if (dlg.ShowDialog() == DialogResult.OK)
-                textBox1.Text = dlg.FileName;
-        }
     }
 }

OpenNest/Properties/Settings.Designer.cs

@@ -158,6 +158,8 @@ namespace OpenNest.Properties {
         [global::System.Configuration.UserScopedSettingAttribute()]
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
         [global::System.Configuration.DefaultSettingValueAttribute("")]
+        // Legacy .nstdot nest-template path. No longer read by the app
+        // except by the one-time migration to defaults.json in MainForm.
         public string NestTemplatePath {
             get {
                 return ((string)(this["NestTemplatePath"]));