User Guide for the VC400 Video Conferencing System76To start/end presentation during a call by changing the video input source:1. Press .The display device shows Camera, Camera and PC and PC input sources.- If you select Camera and PC or PC, the display device will share presentation.- If you select Camera, the display device will end share presentation.NoteDuring a conference call, local and remote video images are displayed on the displaydevice. You can change the screen layout. The system supports three screen layouts. One big, other small ( ): The selected video image is shown in a big sizeformat, the other video images along the right side of the screen are shown insmall sizes. Full screen ( ): The selected video image is shown in full size. Same size ( ): All video images are shown in the same size.If one display device is connected to the VC400 codec (single screen), the defaultscreen layout during a call is: If there is one active call and local system does not start the presentation, theremote video image is shown in big size, the local video image along the right sideof the screen is shown in small size. If there are multiple active calls and the local system does not start thepresentation, both local and remote video image are shown in the same size.For more information on changing video input source, refer to Changing the Video InputSource on page 81.Far end LocalFar end 1LocalFar end 2Far end 3