The Logitech K120 has a conventional row of F1–F12 keys above the number row. Unlike many laptop and multimedia keyboards, it does not use an Fn key or combine the function keys with dedicated volume, playback, or brightness controls. In normal use, each key sends a standard function-key command to the computer.
That straightforward design makes the K120 easy to use in offices, classrooms, and home workspaces. The exact result of pressing a function key depends on the operating system and the application currently in use, but the keyboard itself does not require special software for ordinary operation.
What the F1–F12 keys commonly do
Function-key shortcuts are controlled largely by the program receiving the keystroke. Common examples include:
- F1: Often opens Help in Windows applications.
- F2: Frequently renames a selected file or edits a selected spreadsheet cell.
- F4: May repeat an action in some programs. In spreadsheet software, combinations involving F4 can change cell-reference behavior.
- F5: Commonly refreshes a web page or updates a view.
- F9: Can recalculate spreadsheet formulas in applications that support that shortcut.
- F11: Often switches a web browser or another application into or out of full-screen mode.
These are typical software shortcuts rather than special Logitech features. A key may do something different in a particular application, and some programs may not assign an action to every function key.
Using the K120 function row
To use a function key, press it directly. There is no Fn-lock setting to change and no alternate function layer to select. If a program uses a key combination, follow that application’s instructions—for example, a shortcut may require Ctrl, Alt, or Shift as well as an F-key.
The K120 is a full-size wired USB keyboard with a numeric keypad, so its function row is particularly useful alongside office software, file-management tools, browsers, and other desktop applications. It is also suitable for software that assigns commands to F-keys, although the keyboard does not provide built-in macro buttons or dedicated media controls.
Can the function keys be customized?
The K120 does not include onboard key-programming controls. Custom behavior must therefore be configured through the operating system, an application, or separate keyboard-remapping software.
- On Windows, a utility such as AutoHotkey can assign an F-key to launch a program, run a script, or send another key sequence.
- For straightforward key-to-key changes, registry-based remapping tools such as SharpKeys may be suitable.
- On macOS, keyboard settings and applications such as Karabiner-Elements can provide basic or advanced remapping options.
Remapping can turn an unused function key into a shortcut for a frequently used application or media command. Because these changes are software-based, they may apply only to one computer, user account, or program, depending on the tool being used. Review a utility’s settings before assigning keys that are important to your normal workflow.
Basic setup and keyboard characteristics
Connect the K120’s USB cable directly to a compatible computer. The keyboard is designed for straightforward plug-and-play use, so standard typing and function-key input should normally work without additional Logitech software.
The keyboard uses membrane-style switches, which provide a quieter, cushioned feel than clicky mechanical switches. Its simple design omits backlighting, programmable hardware controls, and dedicated multimedia keys. Those limitations are worth considering if you need built-in volume buttons or extensive customization, but they also keep the layout familiar and uncomplicated.
Troubleshooting function-key problems
If an F-key appears not to work, determine first whether the problem affects one application or the entire computer.
- Disconnect and reconnect the USB cable securely.
- Try another USB port, if available.
- Test the key in more than one application. A program may simply assign no action to that key.
- Close remapping utilities, macro tools, or other software that changes keyboard input.
- Check accessibility and keyboard settings that could affect shortcut behavior.
- Test the keyboard on another computer to help separate a computer-side problem from a hardware fault.
If the same key fails across applications and computers while the other keys work, the keyboard’s membrane or contact beneath that key may be worn or damaged. Cleaning around the key may help with surface debris, but avoid introducing liquid into the keyboard. If several keys stop responding, replacement is often more practical for this type of basic wired keyboard.
Bottom line
The Logitech K120 function keys behave like a standard F1–F12 row: press them directly, and the active operating system or application determines the result. The keyboard offers no built-in Fn layer or hardware remapping, but software tools can add custom shortcuts when needed. For ordinary office, school, and home tasks, its predictable layout and wired USB connection provide a simple way to use familiar function-key commands.
