Planet Technology DVR-471 - Manual (Page 35)

4/16-ch H.264 Digital Video Recorder
4.2.7 Camera
Change the values shown on the screen to adjust the BRIGHTNESS, CONTRAST, HUE and
SATURATION of each channel.
4.3 System
4.3.1 HDD
REC HDD INITIALIZE: Select YES and press ENTER button to format the HDD.
Note: All data will be cleared after initialized. Please be careful.
The value is from 0% to 100% and the default is “50%”.