Further, the current�SystemWindow>>addMorph:fullFrame: assumes thick borders between components, for pane splitters. �There used to be an accessor on SystemWindow, allowPaneSplitters:, that could be used to discard pane splitters and their thick borders, but this was ditched.

So if I want a window containing lots of morphs with no splitters and no thick borders how do I do it?

a) Should I use a container morph and add this to the SystemWindow?

b) should I add an override to SystemWindow that does what addMorph:fullFrame: (or addMorph:frame:) does without adding the thick borders?

c) should I add back the allowPaneSplitters[:] accessor and modify SystemWindow>>addMorph:fullFrame: to take account of allowPaneSplitters == false?

a) seems the right approach, but when I use either a Morph or a BorderedMorph as my container I don't get things laid out correctly in that morph. �Is there a standard container morph that does layout correctly? �If so, what is it?

c) is easy to do, but folks have to maintain it (it's no more than a guard around all the frae manipulation in�addMorph:fullFrame:).