How do you hide sectors..?

hey forum it's me again.

im curious on how people hide sectors,what i mean is it wont show up on your automap in game.

one examples:
one DOOM2 map19 the whole map is a big box but in game it hides the sector that makes it look square.

im probaly explaining this whole question poorly but i hope you know what im trying to say.

It's one of the Line Attribute flags, in some editors it's called No Draw. It's the same set of flags to make lines 2-sided, or block player.

Use3D said:

in some editors it's called No Draw.

In other editors it's called Hidden.

Just to make it clearer, you don't hide the sector, but you hide the lines.

scifista42 said:

In other editors it's called Hidden.

Also, some editors call it "Not shown on automap".