PanedWindows A PanedWindow groups components into separate panes.
Panes are distinct sections within one window.
Adjacent panes are separated from one another by a horizontal separating line and a Sash . The Sash allows you to adjust the relative size of adjacent panes. You move the Sash to change the position of the separating line between two panes, which changes the size of the panes. As the Sash moves, the pane located in the direction of the movement gets smaller while the other pane gets proportionally larger. If a Sash has the input focus, you can adjust a PanedWindow using the keyboard.