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We list three most commonly-asked questions here for users who encounter the same or similar issues.


1. The software only adjusts contrast rather than brightness. How to solve the issue?


2. When I drag the slider to change brightness, the actual brightness level does not change at all. What should I do?


3. I have an Apple laptop or desktop computer (iMac, MacBook Pro, MacBook Air), and installed the adjustment software, however, only the contrast changes, the screen brightness never changes. Any solution?


Before reading the sub-topics, you need to know the concept of video card and/or display adapter. Video card is formally called display adapter, and it is the most important device that connects your motherboard and your screen.