Prima Ripstop air awning front windows

Hi, I'm thinking about buying a Bailey Ripstop 390 air awning but I've been unable to find any photos or info on line to know how the front windows/doors operate. Does the zip open from the top so you can fold them down or is it only from the bottom, we like to sit out in our awning but need to know if we can fold them down to keep our dog safe.

Many thanks