Seems to have changed with Win 10. On my Win 8 keyboard one of the six buttons upper right said 'screen copy', 'print screen' or similar. Now, to the right of the space bar, is a darkened key labeled 'fn' which apparently does not stand for 'fun' which is pushed along with one of the aforementioned six buttons now labeled 'insert' as well as 'prt scr'... at least it is so on my Win 10 keyboard. sigh If you have a notebook, laptop or tablet sans keybord you will have to ask someone more intelligent than moi.
When we got our HP Win 10 laptops, everything on the top row with function keys worked opposite to what was true in the past. (Arrrrgh!) For example, my best friend is F5 to refresh. To do it in Win 10, I had to do Fn+F5. Otherwise, simple F5 did something else — brightened or dimmed the screen, I think.
I don’t know if this is the issue you have, but if so, there is a way to reverse this back to normal, but I forget how. I did it by searching the web. WHY does MS always screw around with this stuff?
I have the FN and ‘prt scr’ buttons. how do I apply them ..please?
9+Windows 10 has a screen capture tool...
https://www.isunshare.com/windows-10/5-ways-to-open-snipping-tool-in-windows-10.html