Q-See QSD2216 - Manual (Page 18)

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5.3 DISPLAY SETUP
BOUND COLOR: Set the Color of Video Boundary (BLACK / WHITE / GRAY).
BLANK COLOR: Set the Background Color of Loss Video (BLACK / WHITE).
5.3.1 CAMERA NAME SET
When the cursor moves to Camera Name, please press the Enter button, the Camera Name
Setup window will appear.
Press the up or down button to select channels, press the Enter button to change the channel
name.