How do you set the magitek cannons to cross-bar?

I can use it via pet-hotbar but I'd prefer if it was on my cross-hotbar. ;XX

I'm on PS4 and for me the commands came on a seperate bar on my normal cross-bar. Just toggled the bars with the shoulder button and they popped.

Yeah you have to set it to do that under configuration. I think it's use Pet bar rather than display pet bar to get it to work. I'm not on my ps4 at the mo so can't tell you exactly where but I know it's the same for the ps3 too.