Press PrtScn to copy the full screen to the clipboard
Press Alt + PrtScn to copy the active window to the clipboard
Press Windows + Shift + S to open the snipping tool and select an area
Press Windows + PrtScn to save a full-screen screenshot automatically
Open Paint or another app and press Ctrl + V to paste the screenshot
Save the pasted image as a file
On Mac, press Command + Shift + 3 to capture the full screen
On Mac, press Command + Shift + 4 to capture a selected area
On Mac, press Command + Shift + 4, then Spacebar, to capture a window