Epson PowerLite 1781W 3200-Lumen WXGA 3LCD Projector - Manual (Page 111)

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Projecting Two Images Simultaneously
You can use the split screen feature to simultaneously project two images from different image sources
next to each other. You can control the split screen feature using the remote control or the projector
menus.
Note: While you use the split screen feature, other projector features may not be available and some
settings may be automatically applied to both images.