Options Menu

Font... Brings up a Font change dialog. Changing the Font affects the Execution window and all Text windows (all share one font).
Time Calculations Toggles on/off timing of each code execution.
Source Copy Toggles on/off whether executing code from a Text Window first copies the code to the Execution Window.
!rational Toggles on/off the ISETL !rational directive.
!setrandom Toggles on/off the ISETL !setrandom directive.
!verbose Toggles on/off the ISETL !verbose directive.
Identifiers Submenu of ISETL directives: !all, !ids, !locked, !oms (displays identifiers)
Information (Memory and Folders) Displays Status Information about Memory Usage, Folder Locations, Ini File Location.