why is my monitor display not full screen

电脑显示屏不是全屏了

tools screenshots         monitortest is an

win10分屏提示投影你的电脑不能投影到其他屏幕解决方法

[lcd monitor]why is my portable monitor not working by using usb

求大神帮我解答,并告诉我解决方案,重谢.

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