It has been asked for many times, going back several versions of MC, to be able to save the entire Theater View so that it can be copied over to Gizmo and DLNA. Would make it so much easier. I have two different DLNA Servers with different settings to get the best possible quality on different devices, so both Servers have to have their own Customize Views set-up separately (even though they are exactly the same). Any changes to Theater View must then be copied over to Gizmo and then DLNA twice.
The only half-way decent work around is to create a (Root) Directory called Theater/Gizmo/DLNA Views in Standard View with all my Theater View settings. This at least allows me to add Library Items. It is still kludgy at best because I still have to add it into Theater View first to see it and make sure it shows up the way I want it, then make any necessary changes back in the Standard View, and finally copy it over 4-times into Theater View, Gizmo, and twice in DLNA.