I'm running Emby Theater on a home-build HTPC, it is connected by HDMI to an Onkyo TX-NR696 receiver, then from the receiver to my LG TV by HDMI. I use Emby Theater for all my TV watching and would like to have it remain full-screen all the time.  I control it using a programmable remote control, so I can program macros or hotkeys.  When the computer is restarted it does not usually start in full-screen mode, but that's not a huge issue as it only restarts once a week so I can just grab my