User Manual Hisense 75U78G U78G Series (2021) 75" 4K ULED Android TV

The Hisense L9G Ultra Short Throw Laser TV projects a colourful and bright 4K image 30.3cm from the wall. This works out to be approximately 11.9 inches. I'm not sure whether you mean 18" inches from the wall edge of the platform, to the wall or from the front edge of the platform to the wall. The projector should not be much further than 11.9" from the wall for best results.

The typical brightness of this model is 350 nits.

The 75H78G has two adjustable positions for the legs. Wider will provide a more sturdy base, but both will work depending on the configuration of your home. The footprints are below (rounded up to the nearest 1/2 inch):
Wide: 51.5" x 14";
Narrow: 26" x 14";

From your home screen, you can scroll across to the inputs you wish to change. You can change the console or antenna to one of the other standard options, or a custom renamed option, or you can remove it entirely. Once you are over the tile you wish to change, press the * key on your remote control or on your Roku mobile app. The options will appear and you can pick the option that makes the most sense for you.