If your talking about the clipping bracket in the terrain/lattice editor just click and drag the bottom of the bracket itself (not the gradient bar) up to clip at the bottom, click and drag the top of the bracket to clip at the top of your terrain. If you don't see the bracket, one of the icons at the top of the center image (view from the top) of the terrain will turn it on. I could illustrate this better with a screenshot, but I'm not home now. Maybe someone else will do that if this explanation isn't enough. Hope this helps.

This is not my "second childhood". I'm not finished with the first one yet.

Time flies like an arrow; fruit flies like a banana.

"I'd like to die peacefully in my sleep like my grandfather....not screaming in terror like the passengers on his bus." - Jack Handy