Do you mean dutch door?
This is a vid on how to make a Dutch Door; which is what you want.
Or do.you mean like a French door? We did just that. Cut the door vertically in half. Matched hinges to the other side, now takes up a lot less wall space.
Are you referring to a dutch door or french door?
Hi Jac: Here's a Hometalk site that tells you just how to do that very thing: https://www.hometalk.com/43341644/diy-dutch-door Good luck