Logitech MX Keys Function Key Issues

As a user of the Logitech MX Keys, I have encountered frustrating function key issues that hinder my productivity.

Cleaning Your Keyboard

Image of a keyboard being cleaned with a microfiber cloth.

To clean your Logitech MX Keys keyboard, start by unplugging it from your computer. Use a can of compressed air to remove any debris from between the keys. Then, lightly dampen a microfiber cloth with water or isopropyl alcohol and gently wipe down the keys and surface of the keyboard. Avoid using excessive moisture. For stubborn dirt or grime, use a soft bristle brush or toothpick to carefully clean around the keys. Be sure to let the keyboard dry completely before plugging it back in.

If you’re experiencing issues with the function keys, try resetting the keyboard by holding down the FN key and pressing the ESC key. If the problem persists, reach out to Logitech support for further assistance.

Customizing Function Keys

Customizable function keys settings.

  • Understanding the Function Keys
  • Common Function Key Issues
  • Resetting the Function Keys
  • Updating Logitech Options Software
  • Customizing Function Key Assignments
  • Assigning Specific Functions to Function Keys
  • Adjusting Function Key Behavior
  • Troubleshooting: Fixing Unresponsive Function Keys
  • Additional Tips and Tricks for Function Key Customization

Adjusting Backlight Brightness

If you are experiencing issues with adjusting the backlight brightness on your Logitech MX Keys keyboard, there are a few troubleshooting steps you can try. First, make sure you are using the correct keyboard shortcut to adjust the brightness. On a Mac computer, use F4 to decrease brightness and F5 to increase brightness. If that doesn’t work, try resetting the keyboard by turning it off and on again.

Additionally, check if the Caps Lock key is stuck or if there are any software conflicts on your computer. If the issue persists, consider reaching out to Logitech support or seeking assistance on platforms like Reddit, where other users might have experienced similar problems.

Checking Battery Life and Multi-Device Connectivity

A battery icon or a device with multiple connection symbols.

Feature Description
Battery Life Long-lasting rechargeable battery with up to 10 days of usage on a single charge.
Multi-Device Connectivity Ability to connect and switch between up to three devices seamlessly using Bluetooth or the included USB receiver.


How do I lock and unlock the Fn key on Logitech keyboard?

To lock and unlock the Fn key on a Logitech keyboard, press the Fn key and Caps Lock key simultaneously to enable or disable the Fn Lock feature.

Why are the function keys not working on my Logitech keyboard?

The function keys on your Logitech keyboard may not be working because the Fn keys are locked. To resolve this, look for an Fn, F lock, or F Mode key on your keyboard and press it once or hold it for a few seconds. If that doesn’t work, try pressing the Fn and Esc keys simultaneously and then attempt to use the function keys.

How do I turn on the F keys on my Logitech MX Keys?

To turn on the F keys on your Logitech MX Keys, simply press the Fn + Esc keys together. This will allow you to switch between the Media keys and the F keys.

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