Keys on my keyboard

Hello, I got a new Razer Cynosa V2 but i do not understand what some of the keys do. Is there a place where I can learn what they do? For example, the On-the-fly macro record key, I do not understand what it does and can't find what it does anywhere. Was there some manual in the box or is there someone who knows what they do? edit: (also I'm sorry for posting this on the off topic chat, im new to the forums)