Scenic Element Movable - Add the ability to have the Size X Y Z dimensions of an object saved in cues

A link to a photo of the venue: 

I agree that that will work in a normal proscenium venue that but our venue is a converted church with a 40' high barrel vaulted ceiling and a Pipe Organ, both of which are always visible to the audience behind the projection screen and above the lighting grid in some of our productions.

'Z'ing a Projection screen up just blocks the upper pipe organ and the back of the ceiling, neither of which happen in the actual venue.  I could have it disappear, but that doesn't help if I need to stop it part way.

you can already do both of your examples:

- each half of the main curtain is nested into a Scenic Element Movable (SEM) each. you can store their X position in cues, so you can move them horizontally in cues.
- the projection screen could fly out, so when nested into a SEM you can change it's Z pos when going from cue to cue.