reference / interface
panel
A titled group in a ui block that folds up when its title is clicked, and starts open: panel "shape" [ ... ]. The widgets inside are made only while it is open, and a widget inside keeps its own value apart from one with the same text in another panel.
dot = 50ui [ panel "dot" [ dot = slider "size" 10 120 start 50 ]]draw [ circle at 300 160 radius dot ]
How to write it
panel text [ ... ] [at number number] [width number]