Q-See QT Series User Manual page 36

Time Tab
You can set the length of time the DVRs record an event before and after a motion detection
or alarm is triggered as well as how long an individual record is preserved.
Pre-alarm record time: This sets the length
of time showing events prior to a
motion detection or sensor-triggered
event that is included in the record.
Post-alarm record: Sets the length of time -
from 10 to 60 seconds - that is
added to the record after the event is
finished.
Expire time: The time - up to 60 days - that
an event is saved on the drive before
it could be overwritten (See Recycle
Record below).
You can set up all channels with same values by selecting All and then configuring one
channel.
Stamp Tab
Select which cameras will display their ID and date stamp and where it'll appear on the screen.
Drag and drop the location of the camera
name and date/time stamp to your desired
location on the screen. This can be done
individually or globally. A "Before" and "After"
example is shown below.
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PICTURE 4-17
PICTURE 4-15
PICTURE 4-16