I go by actual width which is 92" but it supports full 92" wide on 4x3 which is 120" diagonal. The Sony is the first projector I've had in awhile that actually supports the full screen size for this rarely used aspect ratio.
The Sony allows me to preset various screen configurations for each program source and also color space in memory. So, when I switch to a 4x3 AR program source the trigger can switch the screen motor to open it up if I want. Most of the time I keep it in 1.78 and 2.35 AR for movies and HD TV channels. The screen also has side and top and bottom black masks. This is something I designed and built from a standard Da-Lite roll up screen. Da-Lite makes a mask system that works with the Sony Projector Trigger ( so they said) but I priced it and it is expensive. MY screen is rather old now ( about 13 years) It has started to curl at the sides. Time to be thinking about a repair / replacement. BY the way 3D looked last night, I'll probably stick to a 1.0 Matte. I really don't like the hot spot from the high gain screens. Another thing, many people are seeing ghosts on the 3D using high power screens. I can't see any ghosts at all. Another advantage of 1.0 Matte white screen.