As the AG Offset tool has many keypresses for certain operations, we suggest installing the free Astute Graphics plugin Astute Buddy, which creates a panel that dynamically updates to inform you of the various keys which can be pressed in the tool’s current context.
The AG Offset tool is works in conjunction with the associated AG Offset panel, which generally should be open and accessible. If you are using the free Astute Graphics plugin DirectPrefs, you can have the AG Offset panel automatically be shown when the AG Offset tool is selected.
The AG Offset tool offers a graphical method for both adding and editing AG Offset live effects.