Elevator Pathing...?

Elevator Pathing...?

I know, I know, this question has already been posted a billion times I bet, but I just can't find it...

Ok, when I set the elevator height, it matches up with the cliff height, but the unit still cannot walk through it...

I bet there is a basic elevators 101 somewhere... but as stated before, I cannot find it...
--donut3.5--

at the side where u want units to walk on it, or off, u must place a elevator wall (in editor) u can open and close those walls with a trigger function (at destructibles) when it reaches the clifheight (play an animation of the elavator) just open the wall, when it goes down again, close the wall