Epson BrightLink 1485Fi 5000-Lumen Pixel-Shift Full HD Ultra-Short Throw 3LCD Interactive Laser Projector - Manual (Page 170)

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Blending the Image Edges
You can use the projector's Edge Blending feature to create a seamless image from multiple projectors
(BrightLink 1485Fi).
1. Press the Menu button.
2. Select the Multi-Projection menu and press Enter .
3. Select the Edge Blending setting and press Enter .