New maps
File ▸ New writes a Brood War map with the section set StarEdit writes for one: the
x layouts of the settings tables only, and without IVER,
SWNM and CRGB, which StarEdit adds when there is something to put in them. The terrain is
one flat terrain type at the size and tileset chosen in the dialog, laid as StarEdit lays it,
in left/right tile pairs that share a variation, with a matching isometric record. The
location table has 255 slots with Anywhere in place, the fog table starts every player
unexplored, and the start locations the dialog places are part of the new map rather
than an edit to it, so there is nothing to undo.