The system currently supports top/bottom frames, but it can be customized to use three. However, please note that this is a non-trivial change and I don’t think many of us in the community have this use-case so you may not be able to find much help.
I don’t mean to sound negative, I’m just letting you know of the difficulty involved. You’ll have to be ready to explore and change a lot of the code.
If you are unable to implement the changes yourself and no one else in the community joins you with help because they have the same use-case, I would recommend hiring one of the vendors for this project.
Do note that I am not affiliated with the vendors, but I generally recommend them for non-trivial projects that I feel the community at large will not necessarly be able to solve in a volunteer capacity.