Mac Laptop | How Do You Change Key Shortcuts?

I recently got a new Mac OS Laptop. I've had an old Mac before, but never with these shortcuts.

Basically, I'm playing a game where you need to use COMMAND button while moving the UP arrow key. Whenever I do that, it basically just does what F3 does, looks at all the open tabs.

I was just wondering how I could change this. Probably somewhere in the System Settings?

Thanks for your help, and sorry for the vague question.

EDIT: Nevermind, fixed.