I noticed this isn’t filling my whole screen. My cable box is but this is missing about an inch all around on my projector screen. Any way to fix?
Unless you've messed with the screen scaling (Settings/Display/Screen Scale) it has to be a setting in the projector - the Zidoo will output the chosen resolution exactly - so 1920x1080 for 2K and 3840x2160 for 4K etc. Usually a projector will map pixel for pixel.