Once your panes are ready to accept output, you may be interested in creating graphics. CLIM provides elementary graphic functions such as draw-point and draw-circle as well as higher-level graphic functions such as draw-arrow and make-elliptical-arc (see 3.2, Using CLIM Drawing Options). CLIM also supports region operations such as region-intersection and region-difference (see 2.5, General Geometric Objects in CLIM).
Common Lisp Interface Manager 2.0 User's Guide - 7 Aug 2017