Shows the location of a hidden teleporter on Doom 64 level 1, Staging Area. This can be used, once, to return to the player's original starting position on the map. Despite being hidden, this teleporter is not a score-affecting Secret.
Upon using this teleporter, it seals shut, and a few moments later 1 or 2 Sergeant enemies (depending on Skill level) will spawn into the starting area. (Note that a player can still get a 100% Kills score if these Sergeants are never spawned.)
Another non-Secret teleporter on this level also leads to the player's starting position. It can be accessed after going through the blue-keyed door, and then activating a semi-hidden switch in that room. This teleporter can be used any number of times, and won't cause enemies to spawn.
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