Using the VC400 Video Conferencing System103To start/stop 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 PC, the remote video image is shown in big size, and the PCpresentation along the right side of the screen is shown in small size.- If you select Camera and PC or PC, the PC presentation is shown in big size,and other video images along the right side of the screen are shown in smallsize.- If you select Camera, the remote video image is shown in big size, and localvideo image along the right side of the screen is shown in small size. Thepresentation ends.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.For more information on changing video input source, refer to Changing the Video InputSource on page 110.