The ZOOMABLE command enables the user to expand the size of a list box, so that they can more easily enter or see large blocks of text. The most common places to add this command are in a process definition, where minispecs are usually entered, and in the description property of an entity, where foreign key information can be long.
The ZOOMABLE command adds a small button to the right corner of the list box. The button has a plus sign in it when the box is not zoomed, and a minus sign when it is zoomed.