Press Command (⌘) + Shift + 3 to capture the entire screen
Press Command (⌘) + Shift + 4 to capture a selected area
Press and hold the Spacebar after pressing Command (⌘) + Shift + 4 to capture a window (or menu)
Press Command (⌘) + Shift + 5 to open screenshot controls (selection, window, screen recording, and options)
Press Control + Command (⌘) + Shift + 3 to copy the entire screen to the clipboard
Press Control + Command (⌘) + Shift + 4 to copy a selected area to the clipboard
Press Control + Command (⌘) + Shift + 4, then Spacebar to copy a window to the clipboard