In surveillance mode, the gate adjustment/ contrast and brightness switch controls brightness/contrast in which directions?

• A. It toggles through menu options
• B. It acts as the power switch
• C. Up and down control brightness, left and right control contrast
• D. It sets the aim point

Answer: (C)

In this control setup, image adjustments are mapped to the direction you move the switch: vertical movement changes brightness, while horizontal movement changes contrast. So pushing the control up or down will brighten or darken the image, and moving it left or right will adjust the contrast levels. This alignment—that up/down affects brightness and left/right affects contrast—best matches the described behavior, making it the correct interpretation. The other possibilities describe navigating menus, turning the power on or off, or setting the aim point, none of which pertain to adjusting brightness or contrast.