Windows

• The default key combination to paste within the Windows operating system is "Ctrl" plus "V." It doesn't matter whether you use the "Ctrl" key on the left of your keyboard or the one on the right; the former, though, is closer to the "V" key and therefore may be more comfortable to use in this keystroke combination.
  
  

Mac

• On a Mac computer, the key combination to paste is "Command" plus "V." You can identify the "Command" key by the symbol printed on it; this symbol looks like a square with a loop at each corner. On some keyboards, this key may also have an Apple logo. Both "Command" keys will work; because of the position of the keys on a Mac keyboard, you're likely to be equally as comfortable using either of them.
  
  

Linux

• Common desktop Linux distributions, such as Ubuntu, Mint and Fedora, use "Ctrl" plus "V" as the keyboard shortcut for the "paste" function. If you're using a different distribution, consult that distribution's documentation, as there's no guarantee that keyboard shortcuts will be the same.
  
  

Individual Programs

• Although individual programs will generally support the keyboard shortcuts of the operating system under which they're running, they may also offer additional keyboard shortcuts for specialized functions. For example, a word processing program may offer, in addition to the normal "paste" command, the ability to paste text and retain its formatting; similarly, an image editing program may offer the ability to paste an image within a selection. To learn more about these shortcuts, consult each program's manual or help file; keyboard shortcuts are also often displayed in the program's menus.