Frequently used actions or toggles can be assigned to function keys for convenience. As an example, this article describes how to assign the following actions to function keys, which can be particularly useful for users switching from AutoCAD based applications.
Select Workspace > Function Keys from the main pull down menus of the application.
Select the row corresponding the function key to be changed.
Enter the key-in into the Action field, press Enter. For F3: ACCUSNAP TOGGLE For F7: ECAD EXEC SHOWGRID For F8: LOCK=AX For F9: LOCK=GR
Platform Fundamentals for Promis.e Standalone Users