How do you remove/move the intermissions, triggers, targets, and etc boxes after a save? What I mean is once you place in a, for example, info_player_intermission, and then place it where you want and then press esc, and you decide to move it somewhere else and press ctrl-z, but once you saved and quit and THEN decided to move the box somewhere else there doesn't seem to be a way to undo the position. Is there actually another way to move/remove these kinds of things?
