Q-See QSD6204 - Manual (Page 27)

(2) SET TIME
You can change year/date/hour/minute/second by using the SET
TIME menu.
.Year
.Date
.Hour
.Minute
Second
2007/11/11=year/month/day 17:50:01=hour/minute/second Use
the “LEFT” and “RIGHT” buttons on the front panel to move
the cursor below the numbers back and forth. Then use the
“SELECT” button to change the numeric values of date & time.
(3) HIDDEN CHANNEL
In the example,
select HIDDEN
CHANNEL
[4], camera 4 IS
hidden.
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