START_MAP

Usage:
START_MAP <Map Name>

Description:
All triggers after this tag are associated with the specified map number.

Details:
<Map Name> is the same as the lump name, for example e#m# for DOOM1, and map## for DOOM2.

If you use the keyword "ALL" (without quotes) instead of a mapname then the trigger will apply to ALL the maps, almost like a global function.