The fixed page size setting is stored in the database. Please do not rely too much on this feature yet - the large number of change I'm releasing with 3.9.4 will make it usable. It is not currently usable in any way due to the design defects, as I did not properly handle scaling across different devices/screens. I had mentioned that previously in the hope that you wouldn't try to use it too much until my fixes were in place.
If you need the specifics, look at the "Width" and "Height" columns in the "Files" table.
Mike
If you need the specifics, look at the "Width" and "Height" columns in the "Files" table.
Mike