How do I allow a map to cover the entire screen? Help will be wholly appreciated.

what do you mean?

How do I make a map cover the entire screen? How do I show more of the map than how much is shown in that one box?

oh lol is there more you made? oops I honestly don't know what wrong, can I see the code please, or is it just my code with a map?

Well, what I need to know is the code necessary to make a map take up the whole screen. I need to know what code to add to do this.

uh well if you haven't done anything to it it should be covering it, otherwise use BGOFS same as spofs basically, layer number first, then x/y

You can use BGSCALE in conjunction with BGOFS to fit the background to the whole screen, but it would look bad if using decimals. The best chance of having a pixel-perfect map is by duplicating some tiles until you fit the whole screen.

Make a bigger map?