I'd like to create a trench for a basement stairwell, but haven't figured a way to do it. I could use some help.
Hi and welcome to the forum,
I presume you mean a hole in the Terrain where you can insert a stair. If so the easiest way is probably to use the Pad tool on the Terrain toolbar. Just draw the Pad the shape you want with it set as a negative figure that is the basement depth, then insert the stairs at basement level.
Allan
Excellent! That worked perfectly. Thanks for the help.