Since you probably don’t know what arrow key you pressed the first time, keep trying either combination with each of the four arrow keys until you are successful in switching your computer’s screen orientation from vertical back to horizontal. All you need to do is press Ctrl + Alt + a specific arrow key or Shift + Alt + a specific arrow key (the arrow key you need to press depends on the GPU that your computer has). If you have ran into the misfortune of having your computer’s screen turn from horizontal to vertical, fear not as this can be fixed pretty easily. These two keyboard shortcuts are what toggle the change in screen orientation on almost every single GPU that supports the hotkey feature. In actuality, what happens when your computer’s screen goes from horizontal to vertical is that you accidentally press a hotkey combination – such as Ctrl + Alt + any one of the four arrow keys on your keyboard or the same with Shift instead of Ctrl (the arrow key you pressed depends on the GPU that your computer has). To any person who does not know about this feature of their computer’s GPU, their computer’s screen suddenly becoming vertical and them not being able to use their computer without tilting their head 90° might not only be extremely confusing but can also prove to be highly detrimental to their computer use. Many GPUs allow users to change their screen orientation – this is a feature designed specifically for computers that are capable of supporting the screen’s vertical orientation – such as those that support touch input. The ability to change your computer’s screen orientation is actually a feature brought to you by your GPU.
This can be quite a problem for most users of the Windows Operating System, especially if they have a computer that is not, by design, capable of entertaining a portrait landscape.
If you’ve ever been in a spot where you were fiddling around with your computer’s keyboard or your child or pet gained access to your computer’s keyboard and started playing around with it, the unnecessary and random fiddling with the keyboard may have resulted in your computer’s horizontal screen changing its orientation and becoming vertical.
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