I was a bit fast and loose with my terminology. The pieces of the front end (in Cruzbike's terms, I think) moving from the crankset to the handlebars are respectively: boom, boom clamp, pivot clamp, slider. Just to make sure it's clear, the pivot clamp is the clamp that's connected to the top of the steerer tube.
I normally clamp between the pivot clamp and boom clamp. That raises the front end plenty high enough to allow dropping the wheel down (also controlled by the height adjustment on the stand).
To stop the bike from rotating, I have a block of wood (a piece of an old railroad tie) about 8" tall that I put under the rear wheel. Usually, I just wedge it against the back of the wheel but if I want the bike to be really stable I:
- Raise the stand up a bit higher than I think I'll need it when working.
- Clamp the front end into the stand. Note that I leave the clamp lock that controls its ability to rotate loose so it's able to rotate while doing this.
- Because the clamp is loose, I'm able to easily lift the back wheel up and put the block of wood complete underneath it.
- Lower the stand to whatever working height I want.
Hope this helps.