Last updated at 7:03 am UTC on 19 June 2018
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SystemWindow is a frequently used class in Morphic. It is a subclass of MorphicModel.
A SystemWindow implements a window that can contain other morphs, typically Pluggable<whatever>Morphs.
Has subclass PluggableSystemWindow.
see also PasteUpMorph which is also a subclass of BorderedMorph
How to change system window's appearance