Last updated at 6:29 am UTC on 24 July 2018
Flaps are user interface elements located at the border of the screen. They are similar to drawer handles. When you click on them a drawer opens. You can show and hide them by menu commands.
You can make new flaps and put your own Morphs into them.
When you drag a Morph out it will be duplicated.
The World menu has a 'flaps..." entry
What is a flap? (Implementation notes)
Where do I find the code to create a flap?
Where are the standard flaps defined?