Q-See QSD6204 User Manual page 22

In this example, Channel 1 has sensors installed, Open and Close,
respectively.
MOTION DETECTOR SETUP
This indicates the sub menu for setting up the software motion
detection without any external sensor devices.
MOTION
The image below shows the Motion Detection Area setup. As you
SENSOR see in the example below there are 3 shaded regions. Each region
RECORDING represents different levels of motion sensitivity required to activate
sensor recording.
Adjust the sensitivity by first selecting the specific region in the
view you would like to set. Then press 'STOP' button to adjust the
sensitivity.
A blinking block (cursor) shows the particular setting sensitivity for
that block. The Level 0 setting means the block area is disabled.
Level 3 is the highest level of sensitivity. By pushing the
"SELECT" button you can choose the sensitivity of the blinking
block.
In this example, Channel 1 has Motion Detection enabled.
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