The callbacks that are necessary for the menu system are much simpler than for the layouts; the example interface only contains two menu commands, and they only require one callback each.
"Graph"
menu item, display its Attributes dialog and change the Callback attribute to
'display-graph-selection
. Click
OK
.
"List Panel"
menu item, display its Attributes dialog and change the Callback attribute to
'display-list-selection
. Click
OK
.LispWorks IDE User Guide (Unix version) - 25 Nov 2011