Epson PowerLite 685W 3500-Lumen WXGA Ultra-Short Throw 3LCD Projector - Manual (Page 30)

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Rear projection from a table or portable cart behind a translucent screen
Wherever you set up the projector, make sure to position it squarely in front of the screen, not at an
angle.
If you project from a table or portable cart, or from the rear, be sure to select the correct Projection
option in the projector's menu system.
Parent topic: Projector Placement
Related references
Projector Setup Settings - Extended Menu
Projection Distance
The distance at which you place the projector from the screen determines the approximate size of the
image. The image size increases the farther the projector is from the screen, but can vary depending on
the zoom factor, aspect ratio, and other settings.
Refer to the tables in the Installation Guide included with your mount to determine approximately how far
to place the projector from the screen based on the size of the projected image. (Conversion figures may
have been rounded up or down.) You can also use the Projection Distance Calculator
here (U.S.), here
(Canada), or here (Caribbean) .
Parent topic: Projector Placement
Removing and Attaching the Cable Cover
Before you can connect equipment to your projector, you need to remove the cable cover.