saiga12ga

I'm decently new to the game, and in mission editing I cannot for the life of me figure out how to set the 'MOVE' path of a unit to something else. I click the arrow down menus and chse what I options I like, but then....there's nothing to click on like 'OK' or something. I've tried literally every key on the keyboard, too. Help?!? btw also searched this and found nothing.