Q-See QSD2216 - Manual (Page 26)

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When in night as below, please set to normal level.
Note: the above suggestions are a guide only based on testing in a general environment. You
will need to select the best parameters according to the actual operation environment you are
covering. Try different settings until you get the desired motion detection result.
5.6.2 MOTION AREA SET
Move the cursor to Motion Area Set, then press the Enter button, and the area setup window
will appear. Press the up, down, left, right button to move the cursor and press the Enter
button to change from detection ON to OFF. Press and hold the Enter button to change all
values to the same as the area you have selection.
If the area marker icon is set to yellow, this area is monitored for motion detection, and if the
icon is blue, motion sensing is disabled for that area.