Blanks can be filled in either with the results of computation or with what a person typed in. Now we indicate such conflicts in two ways.

• Blanks filled in from computations get a distinct look (the cyan background), separate from both hand-written (black on white) and computed, non-editable text (cyan on white)
  
• If I manually edit a blank, its background changes, and any code that was overridden doesn't execute. Here are a couple of examples:

  
  

But perhaps the color choice is too strong:

This post is part of my Freewheeling Apps Devlog.

Comments gratefully appreciated. Please send them to me by any method of your choice and I'll include them here.