I'm currently drafting the overscan bounty and I have two questions:
1) In the overscan prefs there are two settings: text overscan and graphics overscan - what is their purpose? Amiga does not have a text mode.
2) In the overscan prefs there are monitors listed, however for each monitor only one mode is overscannable it seems, for example for PAL it is 640x256 while for MULTISCAN it is 640x480. Why is that? What is the rule of which mode is overscannable?