pf keys

The tag 'pf keys' refers to the programmable function keys found on some keyboards, such as the Microsoft Natural Keyboard. These keys have dual functions: a primary action printed on the top surface (e.g., 'Open') and a secondary PF key number (e.g., PF5) printed on the front. Users may need to press a modifier key like Fn, Alt, Ctrl, or Shift to access the PF key function instead of the default action. On Windows 8.1, users have reported difficulty switching between these modes, often requiring specific key combinations or software settings to use PF keys for tasks like browser reloads.