starcraft x-tra editor is an editor with i think 6 functions.
1. Basic mode-basic staredit
2.12P mode-everything you made in basic is now the 12 players stuff and you can change it all
3. Base mode- for your buildings and stuff
4.alternative mode-i forgot what this one does but i thinks its for the units and stuff.
5. Special mode- lets you stack building on top of each other and alot of stuff like that.
its good and all but someone told me staredit advanced is better so if you have it please say something like what its about and where to get it.