If you just want a picture of the window you are currently typing or clicking in, stop hitting Print Screen. Instead, use the Alt + Print Screen combo.
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Screen printing or taking a screenshot of just one monitor in a multi-display setup can be done using built-in keyboard shortcuts on both Windows and macOS. The standard "Print Screen" key typically captures your entire desktop, including all connected monitors, so specific combinations are required to isolate a single screen. Windows 10 & 11 Methods how to screen print only one monitor