My İbm notebook have 3 choose for 4 button 4,+,$ what can i do

Ofcourse i have + button as you can see:D but the problem is the same button + and 4 you konow this mean nitro usage and i tried several times with shift button but only help my speed with nitro:)

Thanks but i have a notebook and i haven't that button i couldn't solve this problem yet.

Hi, I pushed (_,-) button which is next to ? button on my computer it caused my war screen being smaller than normal screen and i can't solve this problem any other button can anyone help me? Thanks.