Adjusting Brightness/Contrast For The Live Video - Planet NVR-420 User Manual

4-CH H.264 Network Video Recorder with HDMI
User's Manual of NVR-420
Once the image is digitally zoomed in, use the mouse scroll button to
further zoom on or zoom out the image. Hold and left-click on the image
and move the mouse to move the zoom in video.

4.3 Adjusting Brightness/Contrast for the Live Video

You are able to adjust brightness of the live video from the right-click
menu.
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