diff --git a/MoneyMap/Pages/Receipts.cshtml b/MoneyMap/Pages/Receipts.cshtml
index 7fd5fef..476368a 100644
--- a/MoneyMap/Pages/Receipts.cshtml
+++ b/MoneyMap/Pages/Receipts.cshtml
@@ -200,7 +200,7 @@
 @foreach (var r in Model.Receipts.Where(r => !r.TransactionId.HasValue))
 {
     <div class="modal fade" id="mapModal@(r.Id)" tabindex="-1" aria-labelledby="mapModalLabel@(r.Id)" aria-hidden="true">
-        <div class="modal-dialog">
+        <div class="modal-dialog modal-lg">
             <div class="modal-content">
                 <div class="modal-header">
                     <h5 class="modal-title" id="mapModalLabel@(r.Id)">Map Receipt to Transaction</h5>
@@ -209,29 +209,48 @@
                 <form method="post" asp-page-handler="MapToTransaction" asp-route-receiptId="@r.Id">
                     <div class="modal-body">
                         <div class="mb-3">
-                            <label class="form-label">Receipt: @r.FileName</label>
+                            <label class="form-label fw-bold">Receipt: @r.FileName</label>
                             @if (!string.IsNullOrWhiteSpace(r.Merchant) || r.ReceiptDate.HasValue || r.Total.HasValue)
                             {
-                                <div class="small text-muted">
+                                <div class="small text-muted bg-light p-2 rounded">
                                     @if (!string.IsNullOrWhiteSpace(r.Merchant))
                                     {
-                                        <div>Merchant: @r.Merchant</div>
+                                        <div><strong>Merchant:</strong> @r.Merchant</div>
                                     }
                                     @if (r.ReceiptDate.HasValue)
                                     {
-                                        <div>Date: @r.ReceiptDate.Value.ToString("yyyy-MM-dd")</div>
+                                        <div><strong>Date:</strong> @r.ReceiptDate.Value.ToString("yyyy-MM-dd")</div>
                                     }
                                     @if (r.Total.HasValue)
                                     {
-                                        <div>Total: @r.Total.Value.ToString("C")</div>
+                                        <div><strong>Total:</strong> @r.Total.Value.ToString("C")</div>
                                     }
                                 </div>
                             }
                         </div>
                         <div class="mb-3">
-                            <label for="transactionId@(r.Id)" class="form-label">Transaction ID</label>
-                            <input type="number" class="form-control" id="transactionId@(r.Id)" name="transactionId" required />
-                            <div class="form-text">Enter the transaction ID to map this receipt to. You can find transaction IDs on the Transactions page.</div>
+                            <label for="transactionId@(r.Id)" class="form-label">Select Transaction</label>
+                            <select class="form-select" id="transactionId@(r.Id)" name="transactionId" required size="10" style="font-family: monospace; font-size: 0.9rem;">
+                                <option value="" disabled selected>-- Select a transaction --</option>
+                                @foreach (var txn in Model.RecentTransactions)
+                                {
+                                    var displayText = $"{txn.Date:yyyy-MM-dd} | {txn.Amount,10:C} | {txn.Name}";
+                                    if (!string.IsNullOrWhiteSpace(txn.MerchantName))
+                                    {
+                                        displayText += $" ({txn.MerchantName})";
+                                    }
+                                    <option value="@txn.Id">@displayText</option>
+                                }
+                            </select>
+                            <div class="form-text">
+                                Showing last 100 transactions without receipts.
+                                Can't find it? <a asp-page="/Transactions" target="_blank">Open Transactions page</a> to find the ID and enter it manually below.
+                            </div>
+                        </div>
+                        <div class="mb-3">
+                            <label for="manualTransactionId@(r.Id)" class="form-label">Or Enter Transaction ID Manually</label>
+                            <input type="number" class="form-control" id="manualTransactionId@(r.Id)" placeholder="Enter transaction ID..."
+                                   onchange="document.getElementById('transactionId@(r.Id)').value = this.value" />
                         </div>
                     </div>
                     <div class="modal-footer">
diff --git a/MoneyMap/Pages/Receipts.cshtml.cs b/MoneyMap/Pages/Receipts.cshtml.cs
index 06d5bab..15d0b6f 100644
--- a/MoneyMap/Pages/Receipts.cshtml.cs
+++ b/MoneyMap/Pages/Receipts.cshtml.cs
@@ -21,6 +21,7 @@ namespace MoneyMap.Pages
         }
 
         public List<ReceiptRow> Receipts { get; set; } = new();
+        public List<TransactionOption> RecentTransactions { get; set; } = new();
 
         [BindProperty]
         public IFormFile? UploadFile { get; set; }
@@ -168,6 +169,31 @@ namespace MoneyMap.Pages
                 Total = r.Total,
                 StoragePath = r.StoragePath
             }).ToList();
+
+            // Load recent transactions without receipts for mapping dropdown
+            var transactionsWithReceipts = await _db.Receipts
+                .Where(r => r.TransactionId != null)
+                .Select(r => r.TransactionId!.Value)
+                .ToListAsync();
+
+            RecentTransactions = await _db.Transactions
+                .Include(t => t.Card)
+                .Include(t => t.Account)
+                .Include(t => t.Merchant)
+                .Where(t => !transactionsWithReceipts.Contains(t.Id))
+                .OrderByDescending(t => t.Date)
+                .ThenByDescending(t => t.Id)
+                .Take(100) // Last 100 transactions without receipts
+                .Select(t => new TransactionOption
+                {
+                    Id = t.Id,
+                    Date = t.Date,
+                    Name = t.Name,
+                    Amount = t.Amount,
+                    MerchantName = t.Merchant != null ? t.Merchant.Name : null,
+                    PaymentMethod = t.PaymentMethodLabel
+                })
+                .ToListAsync();
         }
 
         public class ReceiptRow
@@ -186,5 +212,15 @@ namespace MoneyMap.Pages
             public decimal? Total { get; set; }
             public string StoragePath { get; set; } = "";
         }
+
+        public class TransactionOption
+        {
+            public long Id { get; set; }
+            public DateTime Date { get; set; }
+            public string Name { get; set; } = "";
+            public decimal Amount { get; set; }
+            public string? MerchantName { get; set; }
+            public string PaymentMethod { get; set; } = "";
+        }
     }
 }