This dialog allows you to set comment editor appearance.
Show comment editor as modal window
Editor will open as modal window.
Show comment editor as modeless window
Editor will open as modeless window. You can continue to work with IDE while editor is open.
The following settings apply to modeless editor.
Tool window
Editor is in VS .NET tool window. It looks like Solution Explorer, for example. This window can be docked as any other IDE windows, just check Dockable option.
Tabbed document window
Editor is in VS .NET document window. It looks and behaves as any other VS .NET document, e.g. source code.
Automatically apply changes
When this option is checked, you don't need to press Apply button to apply changes from Comment editor to comments. When editor looses focus, changes are automatically applied. This avoids situation when you have editor and source code window opened side by side and you forget to press Apply when leaving editor. On the other hand, it will also apply changes you made in editor but don't want them to apply. In such case you must undo in source code window.