I've added a feature that does best fit of the surface in the editor when a file (from clipboard) is opened.

src/Greenshot.Editor/Forms/ImageEditorForm.cs

@@ -181,8 +181,19 @@ namespace Greenshot.Editor.Forms
 
             UpdateUi();
 
-            // Use best fit
+            // Use best fit, for those capture modes where we can get huge images
+            bool useBestFit = _surface.CaptureDetails.CaptureMode switch
+            {
+                CaptureMode.File => true,
+                CaptureMode.Clipboard => true,
+                CaptureMode.IE => true,
+                _ => false
+            };
+
+            if (useBestFit)
+            {
                 ZoomBestFitMenuItemClick(this, EventArgs.Empty);
+            }
 
             // Workaround: As the cursor is (mostly) selected on the surface a funny artifact is visible, this fixes it.
             HideToolstripItems();

src/Greenshot/App.config

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 
 <configuration>
-  <!--<system.windows.forms jitDebugging="true" />-->
   <startup>
     <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
   </startup>