If redrawing of your
flickers on Microsoft Windows or Motif, perhaps because there are many pinboard objects or the redisplay is complex in some other way, you can use the new initarg
. This makes a pixmap to buffer the output before drawing it to the screen.
(which was not documented but was used in some CAPI examples distributed with LispWorks 5.1 and earlier versions). Use
has no effect on Cocoa and GTK+ because these libraries always buffer the output.