defaultthingflags (structure)
This defines what the default flags should be first the first new thing when inserted. In map formats that use numeric thing flags, the settings in this structure should be the numeric flags to set. In map formats that use named flags, the settings must be the names of the flags to set. The value of the settings is optional and is ignored by Doom Builder.
Example for numeric flags:
defaultthingflags { 1; 2; 4; 32; }
defaultthingflags { skill1; skill2; skill3; single; coop; }