Unit pass through other units?

Sorry im a noob but how do i edit a certain type of unit to be able to pass through other units like they arent there? And other units can pass through it.

ok, you wanna go under the untis pathing, and switch it to that of a circle of power, thats all

this one will only work for buildings, ill help u out in a minute

I just made the unit a flying unit which is all i needed. Works fine, thanks anyways.

or give it a collision of 0, flying wil make it hover a little bit above the ground.