FN keys on the laptop turn around?

I'm projecting on F5 screen and must always press FN, so I can reload the page with F5.

My question: How do I get that out, that I always update the page with F5 and project only when printing on FN?

In the BIOS you will find mostly setting.

Depending on the BIOS you should search for Action Keys Mode, Function Key Behavior, Hotkey Mode or similar.

FN + Esc = Then FN should always be on.

Does not work with me. I have an Acer, that's probably different. But I can't find anything.