265Click you can view the locked file. See Figure 4-111.Figure 4-111Select a file in the above figure and then click Unlock, you can unlock it.4.6.9 Other Aux Functions4.6.9.1 Digital ZoomIn 1-window playback mode, left click mouse to select any zone on the screen, you can zoom incurrent zone. Right click mouse to exit.4.6.9.2 Switch ChannelDuring playback mode, select from the dropdown list to switch playback channel. This function is notfor the channel of no record. The smart search channel does not support this function either.4.7 Event Manager4.7.1 Video DetectIn the main menu, from Setting to Detect, you can see motion detect interface. See Figure4-112.There are four detection types: motion detection, video loss, tampering and scene changing.4.7.1.1 Motion DetectAfter analysis video, system can generate a motion detect alarm when the detected moving signalreached the sensitivity you set here.Detection menu is shown as below. See Figure 4-112. Event type: From the dropdown list you can select motion detection type. Channel: Select a channel from the dropdown list to set motion detect function. Enable: Check the box here to enable motion detect function. Region: Click select button, the interface is shown as in Figure 4-113. Here you can set motiondetection zone. There are four zones for you to set. Please select a zone first and then left drag themouse to select a zone. The corresponding color zone displays different detection zone. You can
