Chapter 28. The Panedwindow Widget

The panedwindow widget, introduced in Tk 8.4, displays widgets in resizable horizontal or vertical panes.

A panedwindow contains any number of panes, arranged horizontally or vertically. Each pane contains one widget, and each pair of panes is separated by a moveable sash, which causes the widgets on either side of the sash to be resized. When a panedwindow is resized externally — for example, if the user resizes the toplevel containing the panedwindow — space is added or subtracted from the last pane (right-most or bottom-most pane) in the widget.