How to rotate a ZR30w monitor?

[Orthoducks]

I bought a used H-P ZR30w monitor, and it's oriented vertically, as a portrait display. I assumed that rotating it to landscape orientation would be trivial -- just grip it and turn -- but that isn't working. How does one rotate it?

There's a lever on the stand that looks like it might unlock the pivot, but it has no such effect. I downloaded the manual, but it says nothing about this. What's the trick?

[Xplosionist]

You may have already figured this out, but I was faced with the same problem in the opposite direction, and figured it out.

On the back of the monitor, there's a little "thingie" sticking up out of the top (or side) of the mount.  If you slide it either direction, it frees the monitor to slide out of the mount.  Upwards, if in normal landscape orientation, or sideways if it's been turned.

After you remove the display from the mount, you can remove the four screws holding that mount to the stand, and just rotate it 90 degrees, and put it back on.  For your intent, with the lever pointing up.  Then you should be able to slide the monitor back down onto it.

Hope that helps.

[Orthoducks]

Sorry, that didn't help. I tried it before I wrote the original post. It had no effect at all.

I solved the problem by removing the monitor from the stand, rotating it, and reattaching it. So much time has passed that I don't remember whether I found a hint to do that somewhere in the documentation, or I just tried it and it worked. However I arrived at the solution, it did work.