To change the source
Press the source button on the projector or remote control, or
Open the on-screen menu, select input, and select the port to which the input
source is connected.
To hide or show the display
You can easily hide the display from your audience temporarily.
Press the hide button on the remote control. The screen remains blank until you
press the hide button again.
If you are using Microsoft PowerPoint, you can also press the B key or the W key to
hide the display. The screen remains blank until you press the B key or the W key