The paned window widget is a composite widget that lays out children in a vertically tiled format.
The paned window will grow to match the width of its widest child and all other children are forced to this width.
It is a constraint widget, which means that it creates and manages a set of constraints for each child. You can specify a minimum and maximum size for each pane by selecting the appropriate child of the paned window and selecting Constraints from the Widget menu.
For more details see XmPanedWindow(3X) in the OSF/Motif Programmer's Reference.
NOTES
When the minimum size of a pane is equal to its maximum size, then no control sash will be presented for that pane or for the lowest pane.
See also: