调整对比度
您可以调整窗口和按钮的对比度来让它们更加清晰。这个功能和改变整个屏幕亮度不一样，它只改变用户界面部分的设置。
Click your name on the top bar and select System Settings.
Open Universal Access and select the Seeing tab.
Under Display select the Contrast that best suits your needs. Low will make things less vivid, for example.
You can quickly change the contrast by clicking the accessibility icon on the top bar and selecting High Contrast.