A and B are the distances from the front and the back of the projector to the wall. C and D are the height of the image’s bottom edge above the projector and above the surface it stands on. E is the height of the image’s top edge above the floor. With a screen that isn’t 16:9, the projector still throws a 16:9 frame: a wider screen is filled edge to edge with bars above and below, a 4:3 screen top to bottom with bars at the sides. Distances follow that frame, heights the visible screen. On wide formats you can drag the screen up or down within the frame.

Hisense PL2 Throw Distance Calculator