Keyboard commands not working

Do you have any add-ons in your Community folder? If yes, please remove and retest before posting.
No

Are you using Developer Mode or made changes in it?
No

Brief description of the issue:
Very new to Flight Sim
F2 keyboard key does not function - just changes screen brightness - should change thrust

Provide Screenshot(s)/video(s) of the issue encountered:
No

Detail steps to reproduce the issue encountered:

PC specs for those who want to assist (if not entered in your profile)

Did you submit this to Zendesk? If so, what is your ticket #?

Make sure FN (function) key is not enabled or locked to ON. On some keyboards, FN+F2 increases brightness.

Thanks!
How do I make sure FN (function) key is not enabled or locked to ON please ?

I’m guessing you have a laptop keyboard, because a full size keyboard doesn’t have this capability to control brightness.

FN keys are usually in the lower corners near the CTRL and ALT buttons.

Thanks that worked
Next problem is that graphics really jerky - stuttering change rather than smooth graphics
Can anyone help ?
Thanks