get-max-view-size in editor<%>
Returns the maximum visible area into which the editor is currently
being displayed, according to the editor's administrators. If the
editor has only one display, the result is the same as for
get-view-size. Otherwise, the maximum width and height of all the editor's
displaying canvases is returned.
The result is only valid when the editor is displayed (see Basic Organization).
If the display is an editor canvas, see also
reflow-container.