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MorphicDebuggingTips

You can have Morphic visually display the damaged regions before it redraws them. You do this (the location has changed in version 2.9) by going into the method
   WorldState displayWorld:submorphs:
Change false to true on the line which reads
   false ifTrue: [...]
Dan suggested in a list email that this can be used to notice the source of drawing performance problems.

How do you interrupt a running system in Morphic to be able to get at the code behind? (In MVC you could just Control-. to break what was happening and browse around with the debugger, and I am not sure the best way to do this in Morphic).