You can edit the height and width of a window. You can also control the number of horizontal and vertical panes in the window. Some window types have additional properties that define their geometry.
To edit the size of a window:
Select the window whose properties you want to change.
Right-click and select Properties, or select Edit > Modify Elements > Properties.
In the Windows dialog, select the Basic tab.
Edit the dimensions as desired. Clicking a dimension marked with an alphabetical character (a, b, c, etc.) highlights the corresponding dimension in the window graphic, and vice versa.
Click OK.