Poke values to change the width of various things, such as:
how wide the map is interpreted as
(poking 32 will make each row be split into 4 rows, below each-other)
sprite width+height
(pretend that PICO-8 has built in ?? sprites)
(so you can have 512 addressable sprites at 48,
but the map editor can only have the first 256, due to data reasons)

like fillp(), these would effect the editor.

These would just effect how data is read, not give you more or less (besides leftovers in the sprite memory)

Of course, this would be limited, but you could have one continuous line of map tiles, with no Y axis, or a 8 wide pillar, or anything in between.

Thanks for your time!