That 'Select All on Active Artboard' is really useful. If you want to submit live AI files somewhere (which isn't my preferred option, but some publishers insist on getting files that way) and want to clear the pasteboard area around the actual lettering, you can record an action that goes:
- Select -> All on Active Artboard
- Select -> Inverse
- Delete
Voila — everything
not on the actual page is gone.