I'd really like it if someone might be able to help me. I need an answer so that I can make a picture for another post.
Without knowing your exact laptop keyboard layout (may differ slightly between brands/models), what you probably need to do is hit the fn key on your keyboard. This should toggle the the F keys between their usual function and and their special additional functions (screen settings, volume, etc).
If the fn doesn't exist on your keyboard, it may have been labeled something different. My keyboard has ⒻMode, for example.