I would like to know how you change the default map size cause I have know idea

in Zero Editor, go to "Terrain" then click on "Create New Terrain" then type in how big or small you want it to be, but make sure that it is a power of two, or you will get bad errors

In case you don't know, a power of two is 2 x [itself a number of times].

To make it easier, SWBF2 will run these powers of two with no issues:

128x128
256x256
512x512

Just know that 512x512 is absolutely way to big for a map, and a lot of modders start out thinking a gigantic map would be awesome, the trouble is when the AI has taken off with all of the vehicles you have to walk the equivalent of a 1/2 mile on foot to get to the action.

oo thats what that thing in terrain is lol, Thank you 2 very much now I might get some serious map making done for SWBF2