How do I display my map on tne bottom screen, I used DISPLAY 1 but it gives an Out of Range error

The bottom screen is 320x240 pixels wide while the top screen is 400x240 pixels wide. The map you're trying to load is too big for the bottom screen.

Oh wait, I'm totally wrong, sorry. In your XSCREEN, you allocated all of the BG layers to the top screen, so you basically said BG wasn't allowed on the bottom screen.

ok thanks

Wait, I'm confused about xscreen, I want one layer on the bottom screen and one on the top

There are 4 BG layers in total, and since you only need two, it doesn't matter where you allocate the two others. It will always allocate 4. If you set the value to 3 for example, there will be 3 layers on the top screen and 1 on the bottom screen.