1: when you want to take a screen shot on windows 11 you must press the windows key + SHIFT+ S at the same time and it should show this:
2: then move to where you want to take your screen shot and hold down your left mouse button and drag it across the area you want to screen shot, once the highlighted part is to your liking let go of the mouse.
3: It should show up with saved to clip board like this:
4: Go to your file explorer and click on pictures it should show up with a few options, one of them being screenshot.
5: Then your screen shot should be waiting there for you.
Then you're done, your welcome.