Epson BrightLink 1485Fi 5000-Lumen Pixel-Shift Full HD Ultra-Short Throw 3LCD Interactive Laser Projector - Manual (Page 233)

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When performing touch operations with your finger, you can use up to six fingers (depending on the
interactive mode, operating system, and connection type).
Note: A Touch Unit is optional for the BrightLink 1480Fi and must be installed for finger touch operation.
1. Install the Touch Unit as described in the online Installation Guide .
Note: If you are using an older Touch Unit, refer to the installation guide for that model.
2. Turn on your projector. This automatically turns on the Touch Unit also.
The blue light on the Touch Unit turns on.
Note: If the blue light does not turn on, press the Menu button on the remote control and make sure
the Installation > Touch Unit > Power setting is set to On .
3. Calibrate the pens.
4. Adjust the angle of the Touch Unit as described in the online Installation Guide .
Note: If you are using an older Touch Unit, refer to the angle adjustment steps in the installation
guide for that model.
5. Calibrate for finger touch interactivity.