Epson BrightLink 575Wi Guide D'installation page 13

Distance from projection surface to wall plate
The distance (c) from the projection surface to the wall plate is the number given when the vertical slide is set
to the base position, as shown below.
Match the notch on the wall mount to the position of the stamp on the wall plate.
The measurements may differ depending on the location where you place the
projector.
When projecting in Tele, the quality of the projected images may decrease.
When using BrightLink 575Wi/585Wi/575Wi+/585Wi+ or PowerLite 575W/585W to
project images at a 4:3 aspect ratio, the images are resized automatically and the
quality of the projected images may decrease.
Base position
Stamp on plate
Notch on mount arm
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