select Utilities>options
this will open the config.pro editor. Choose the option and the value. Save it as config.pro in your start up directory.
Mapkeys
Utilities>mapkeys
Select new from the box
Enter in the keystrokes you wish to use as the trigger and pick record.
when done, stop and save changed. It is automatically saved to config.pro.
I ASK ABOUT HOW I CAN ADD NEW OPTIONS TO config.pro,
I KNOW HOW EDIT OPTIONS IN config.pro.
IF I DO TO Utilities>Mapkeys I DEFINE ONLY KEYS, NAMES,
DESCRIPTONS, NOT OPERATION.