InFocus LitePro 580 Manual page 26

Using the LitePro 580
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Remote control
To use the remote control, point it at the front or rear of the LitePro or
at the projection screen. The range for optimum operation is within
30 degrees of the receiver at a distance of about 35 feet (10 meters).
If you can't aim the remote control at the projector so that its signal is
received—for example, when using rear projection—you can connect
the remote directly to the projector with a cable. This optional cable is
available from your In Focus dealer.
In menu mode, the trackball, the Adjust buttons, and the Menu Select
button become active. For more information see "Menu mode
controls" on page 24.
LitePro 580 User's Guide