有一些旋钮在上面，用来调节显示器亮度，对比度，颜色以及屏幕大小和位置等。

On the monitor, there are some knobs which are used to adjust its lightness, contrast, color and the screen's size and location, etc.

youdao

如果显示器没有图像显示，首先确保正确设置亮度和对比度的调节进行正确的设置。

If there is no image on display monitor, first ensure that the adjustment for brightness and contrast are properly set.

youdao

如果需要放大阅读，调节电脑显示器，尽量使用反光，不要总是提高屏幕亮度。

For extended reading, change your monitor settings to a reflective lighting scheme. But don't only think about your computer lighting.

youdao