6.5.3 Dividers

Sometimes you may wish to have two or more panes presented in a column layout, with a horizontal divider between them. This is to allow the user the option of resizing one pane into the space of the other. By clicking on the bar between the two panes produced in the layout below, and then dragging it up or down the panes are resized.

(contain (make-instance 'column-layout
                        :description (list green-pane
                                           :divider red-pane)))

Dividers can also be placed between panes in a row-layout or even combinations of row and column layouts.

LispWorks CAPI User Guide (Macintosh version) - 17 Mar 2008