how do you place and set LL doors??

[cdp2003]

i dont know how to place and set LL doors?its so confusing trying to set them up.if i can't it will affect my level making.
please help!!!!!
dont PM reply so other people can see.

[KABOOM]

Doors pretty much work exactly like they do in SM63. The difference is you have to select them to see the path.

[cdp2003]

thanks so much