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substate

substate
Type: one of the values below
On splitters which have state="collapsed" and collapse="both", determines which direction the splitter is actually collapsed in. Since collapse="both" is a Gecko 1.9+ feature, this will have no effect on earlier versions.
before
The element immediately before the splitter is collapsed.
after
The element immediately after the splitter is collapsed.

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 Last updated by: Sheppy,