How to change keyboard layout of macbook pro during first run registration?

Question

I'm running the registration after turning on my new macbook pro for the first time. I've chosen my national keyboard layout and now I can't write @ or + signs. I don't know how to change keyboard layout, some shortcuts like cmd space or cmd alt space don't work. Please notice that I also need to write national characters, so going back and choosing english keyboard layout won't work.

Answer 1

Assuming you use the czech keyboard:

normal

with shift key pressed

with option key pressed