Why Do I Have to Hold Down the Fn Key?

That layout of blue characters mimics the layout of the numeric keypad on a full-sized keyboard. Normally, if you hold down the “Fn” key, you'll get whatever character or function is printed in blue on those keys. So holding down the “Fn” key, you now have a numeric keypad in the middle of your keyboard.

Do you have to hold down the Fn key?

Method 1. Toggle the Fn Lock key

Some keyboards, most commonly laptop keyboards, come with a dedicated Fn Lock key. Pressing this along with the Fn key itself will change your top row from hotkey functionality to Fn keys in an instant, allowing you to perform actions without having to hold the Fn key as well.

Is there a way to keep Fn key on?

Depending on your keyboard, you may actually have a dedicated “Fn Lock” key. If you don't, you may have to press the Fn key and then press an “Fn Lock” key to activate it. ... For example, on Microsoft's Surface keyboards, you can toggle Fn Lock by holding the Fn Key and pressing Caps Lock.