Level progression in Doom Builder

[Mr. Cyberdemon]

I can't figure out how to go to other wads once I exit levels. I already put all the map numbers in sequence and it still does not work. Can anyone give me some advice?

[Nine Inch Heels]

If those maps are still seperate WADs, you're gonna have to compile them into a single WAD that contains all the maps using SLADE.

[leodoom85]

Yeah, you need to compile them first, then you need to redefine the slot of the map by changing it in Doom Builder 2/GZDB in the Map Options (press F2 for that)