You can set it by going to the Billboards tab and clicking on the corresponding Billboard (usually numbered 1-3, depending on how many cameras the compound has.)
Find the Lift value in the Pin Values.
It is a very useful tool to adjust your talent’s vertical position without having to move the whole Billboard and any other linked effects that it may have (e.g. Ambient Occlusion at the feet).
Great to see the Mirror Offset. I was looking for that. Which template is this one from? I am using VirtualCam_Unreal_A-B-Preview 3-Cam.xcomp which does not have the Mirror settings.
Same question for Lightwrap. I was also looking for your Lightwrap to complement your great keyer but could not find it. (any templates to pick it from as a starting point?)