I appreciate the responses.  I never use Sketch, except a couple of times to see how it works.  I do use Setup in flight sometimes, for example to change  Screen Brightness.  I don't expect the team to cater to my preferences, I just wondered if there was a way I was missing.
Sketch must be  popular..... I see it is available in 3 places:  on the main screen, on Map Modes, and  on Main Menu.