You can use Logitech Gaming Software (LGS) version 8.85 or later to make basic adjustments to your HD Pro Webcam C920. Here’s how: 

1. Make sure the C920 camera is connected to your computer.
2. Launch LGS, and select the HD Pro Webcam C920.
3. Click on the Webcam Settings icon.

   

The Webcam Settings window has three panels:

• Webcam Settings
• Logitech Webcam Properties (Advanced)
• Camera Preview

  

Webcam Settings
The Webcam Settings panel lets you adjust the camera’s brightness, contrast, saturation, zoom, and advanced settings.

To customize your webcam settings:

• Brightness — Click and drag the slider to the right to increase and to the left to decrease.
• Contrast — Click and drag the slider to the right to increase and to the left to decrease.
• Saturation — Click and drag the slider to the right to increase and to the left to decrease.
• Zoom — Click and drag the slider upwards to zoom in and downwards to zoom out.
• Viewport — While zoomed in, click and drag the grey rectangle to move the camera lens up, down, left, or right. 
  NOTE: Click on Default to restore all settings to their original values. 
• Advanced — You can customize additional settings for your camera by clicking on  Advanced.  

Logitech Webcam Properties
The Logitech Webcam Properties (Advanced) window has 3 tabs:

• Webcam Control
• Advanced Settings
• Device Info

Webcam control:

Zoom — Click and drag the slider upwards to zoom in and downwards to zoom out. You can also use the zoom in and zoom out buttons to change the focal length of the lens. 
Pan/Tilt controls — Use the left, right, up, and down arrows to fine-tune the field of vision.
Follow my face — Click on the checkbox to allow the camera lens to automatically pan and tilt in order to follow your face. 
RightSound — RightSound is enabled by default on the HD Pro Webcam C920. RightSound technology recognizes and eliminates repeated sound waves before they are reproduced as feedback or echo. To disable this option, click on the RightSound checkbox. 
Auto-focus — Auto-focus is enabled by default on the HD Pro Webcam C920. You can also manually adjust the depth of field on your camera. Click on the checkbox next to Auto-focus, then drag the slider to the right to increase and to the left to decrease.

 Advanced Settings:

• RightLight — RightLight is enabled by default, which automatically improves image quality under a wide variety of lighting conditions. To disable RightLight, click on the checkbox. 
• Exposure — You can adjust the amount of light that reaches the camera sensor. Click and drag the slider to the right to increase and to the left to decrease.
• Gain — Gain is automatically adjusted on the HD Pro Webcam C920 by default. You can use gain to amplify the intensity of the image or video pixels and brighten your image. To manually adjust the camera gain, first click on the checkbox, and then click and drag the slider to the right to increase and to the left to decrease.
• Brightness, Contrast, Color Intensity — These three sliders mirror the ones in the LGS Webcam Settings panel. Click and drag the slider to the right to increase and to the left to decrease.
• White Balance — This setting is automatically adjusted on the HD Pro Webcam C920 by default. To manually adjust the white balance, click on the checkbox next to White Balance. 
• Anti-flicker — Choose a refresh rate for your display depending on the light in your environment. You can use 60Hz, 50Hz or disable the anti-flicker setting.
• Image Orientation — Choose between normal or mirrored orientation, where left and right will be reversed. 

Device Info:
Displays information about the HD Pro Webcam C920 including but not limited to USB Vendor ID, USB Product ID, Firmware version, and Driver Version. 

Camera Preview:
The Camera Preview panel shows you how the different webcam settings affect the video feed.