Click [Video] - [Video Preview], the interfaces displayed as below:

Select different video servers from the [Video Server] drop-down list, and click a video channel for real-time preview, or click the button similar to the mesh shape in the video frame for synchronous preview of multiple channels.
? Note: The style of the preview display varies with the video device brand. The following uses the HIKVISION video device as an example to describe the icons on the video preview page.
Double-click preview frames have change-over full screen function.
Click
to stop previewing all videos.
Click
to capture the current picture.
Click
to start video recording on all channels of the current
video server.
Click
to stop video recording on all channels of
the current video server.
Then the video files of all channels are stored in: C:\Program Data\Web\RecordFiles\ of the client.
Click
to move previewed pictures up or down.
Click
to turn on, turn off, or adjust the sound.