things... flags?

i'm new to doom builder and...


i previously made a map, the things have shown up. now in a new map i am working on, the things do not show up. what can this be, and how can i make these things appear? ...



seems to vague.

all the items i put in BEFORE i had changed a flag value appeared. but i thought flags value meant item respawn. i was wrong.

can anyone help me or refer me to any kind of information about "things" in general?

Use the same game configuration? press T to go to Things mode?