(axe.info)CustomTree
How to customise the tree window
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The tree window has the following widget structure. The names in
parentheses following the widget names are the corresponding widget
class names.
treewin (TopLevelShell)
pane (Paned)
form (Form)
porthole (Porthole)
tree (Tree)
bpane (Paned)
quit (Command)
close (Command)
info (Label)