Press the Print Screen key to capture the entire screen
Press Alt + Print Screen to capture the active window
Press Windows key + Shift + S to open the snipping tool on Windows
Press Command + Shift + 3 to capture the entire screen on Mac
Press Command + Shift + 4 to capture a selected area on Mac
Open the screenshot from the Pictures, Screenshots folder on Windows
Open the screenshot from the desktop or Finder on Mac
Paste the screenshot into an app with Ctrl + V or Command + V if copied to the clipboard