Use case or problem
When changing settings pertaining to the UI, such as text colors, the GUI gets in the way so I have to keep escaping out of it to preview the changes, then switch back in.
As you can see, the Prefs GUI blocks the view:
Proposed solution
Make the modal preferences dialog resizable and movable.
Current workaround (optional)
Open a new window and modify the preferences there while observing changes in the current window.