Epson BrightLink 1485Fi 5000-Lumen Pixel-Shift Full HD Ultra-Short Throw 3LCD Interactive Laser Projector - Manual (Page 312)

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Setting Options Description
Number of Projectors 2 to 4 Sets the number of projectors
used to create a unified image;
this setting is displayed only if
HDMI Out Setting is set to Pass
Through
Order 1 to 4 (when HDMI Out Setting
is set to Pass Through )
1 or 2 (when HDMI Out Setting
is set to Process Out )
Sets the projector's position in
numbered order from left to right
Connect Computer Yes
No
Set to Yes if you connected a
computer to the projector; this
setting is displayed only if
HDMI
Out Setting is set to Process
Out