Yealink VC400 User Manual page 119

Press (Presentation soft key) on the remote control again to end a presentation.
Press on the VCP40 phone to start a presentation.
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Press again to end a presentation.
To start/stop presentation during a call by changing the video input source:
Press .
1.
The display device shows Camera, Camera and PC and PC input sources.
If you select PC, the remote video image is shown in big size, and the PC presentation
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along the right side of the screen is shown in small size.
Using the VC400 Video Conferencing System
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