I have this keyboard and the only thing that (for me) is really annoying is that by default the fn keys are enabled. So If I need to reload a page (F5) I have to press the fn. If a press the fn**key alone it enables the F buttons but the light in the **fn key is always on (what I suppose is not good for the battery)

Is there a way to invert this behavior? I have tried Caps+fn and keep FN pressed 10 seconds without success.


6 Answers 6


@Ovidiu's method really works. But in fact you don't have to hold for 10 seconds and neither hold Caps+Fn at the same time! You simply press Fn key once and make the led on the key light. That means Fn is disabled and you can use F1, F2, ... as usual. To enable Fn again, just press the Fn key again to turn the light off. Really easy but not that easy to find! ^_-

  • 1
    For anyone in doubt - there is an LED on the Fn Key - I thought maybe this comment was referring to a different model than mine, but it is for the "Microsoft designer Bluetooth Keyboard"
    – Paul Hazen
    Sep 16, 2021 at 1:59
  • This isn't great... I use the Fn key a lot, and on keyboards where it acts as a toggle, I tend to often toggle it accidentally, which is really annoying (I have this problem with the Surface Pro keyboard) Nov 16, 2022 at 3:53

Just hold down Fn key first, then press Caps Lock once, it will be inverted immediately.

  • Nope, it does not work.
    – distante
    Dec 4, 2020 at 15:48
  • 1
    The other methods didn't seem to work for me, but this one did! Thanks! Jan 18, 2021 at 16:00

Actually, Caps+Fn works. I really don't know how I did it but trust me, it works. Press Caps key 1st and Fn key immediately after. Hold for 10 seconds and press Fn key again. You will see a small led turning on. That means you can now use your F keys without pressing the Fn key.


Fn + (key) + Esc works on my Craft Keyboard. I use it for my work laptop which utilizes a mainframe emulator. It was a pain to have to press Fn + (key) for the terminal emulator functions.

Found the answer in this article: https://en.code-bude.net/2017/09/02/change-logitech-fn-key-behaviour-without-software/

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    – Community Bot
    Mar 28, 2022 at 16:08

For the Microsoft Designer Compact Keyboard, you can use the Microsoft Mouse and Keyboard Center app to configure the default Fn state, and I assume it also works for the full-size keyboard. Helpful if you've remapped Capslock to Left Control.

Support page

Microsoft Mouse and Keyboard Center app download

  • Sadly just the compact is listed there
    – distante
    Dec 4, 2020 at 15:47

download the Microsoft software for mouse and keyboard to make the change. https://support.microsoft.com/en-us/topic/mouse-and-keyboard-center-download-f5b10905-7887-eedb-2f1c-d0737a36a3b2

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