PLANET NVR-420 - Manual (Page 24)

4.2.2 Preset Point Viewing
Start by selecting a PTZ camera from the drop-down list
Its available PTZ preset points will be listed in the drop-down list
shown below. Click "Go to" to move to the selected position.
4.2.3 Auto Pan Viewing
Use the Auto Pan control buttons to pan right, left and stop auto pan
Certain cameras do not support bi-directional pan movements. Use the
“Auto pan” button for such cameras
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4-CH H.264 Network Video Recorder with HDMI
User’s Manual of NVR-420