Digital Zoom; Instant Backup; Manual Snapshot; Two-Way Talk - Dahua NVR52-EI Series User Manual

Go to the Main Menu > SYSTEM > General > Basic to set instant playback time.

5.6.3.2 Digital Zoom

You can zoom in a specified zone of the current channel to view details. They system supports
multi-channel zoom. You can use the digital zoom in the following two ways:
● Click
. The icon switches to
mouse button.
For some models, when the image is enlarged in this way, the selected area is zoomed
proportionally according to the window.
● Point to the center that you want to enlarge, and then scroll the mouse to enlarge the area.
When the image is in the enlarged status, you can drag the image toward any direction to view the
other enlarged areas. Right-click to cancel zoom and go back to the original video image.

5.6.3.3 Instant Backup

You can record the video of any channel and save the clip to a USB storage device.
Clicking to start the recording. To stop recording, click this icon again. The clip is automatically
saved to the connected USB storage device.

5.6.3.4 Manual Snapshot

You can take one to five snapshots of the video and save to a USB storage device.
Click to take snapshots. The snapshots are automatically saved to the connected USB storage
device. You can view the snapshots on your PC.
To change the quantity of snapshots, select Main Menu > CAMERA > Encode > Snapshot, in the
Manual Snapshot list, select the snapshot quantity.

5.6.3.5 Two-way Talk

Background Information
You can perform the voice interaction between the NVR and the remote device to improve efficiency
. Select an area. The area is enlarged after you release the
Figure 5-17 Zoom
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User's Manual