How to adjust screen brightness in Windows 7 win7 adjust screen brightness using power options

When using a notebook, the brightness of the notebook screen may be brighter or darker as the surrounding light changes. The following describes how to adjust the screen brightness using the power options:
 
1. Open control panel and select power options ].

2. Select "Samsung optimization mode" and click "Change Plan settings ].

3. Adjust the position of the brightness bar below to select the desired brightness. Click save and modify.

Tip:

If you cannot adjust the screen brightness, you are advised to download the graphics driver for the notebook model and operating system on the Vivo official website and reinstall it.