Screenzoom function on magic mouse doesn't work

Hey,

Yesterday i bought a brandnew Apple Imac. I Love it, but i have a small problem with the magic mouse. I know you can zoom using de double tap function, but in de magic mouse video they say you can zoom using the cmd key and scroll with de magic mouse. and that doesn't work. does somebody know how i can use this function on the magic mouse? I'm from Holland so i'm sorry for my bad English 😝

Kind regards,

Jimmy