A half to a hitch is basically a half and a hitch put together. Unlike the hitch you can have as many halfs and hitches as you want as long as you have enoff flyers, bases, and spots. With this kind of hitch it's easier to have only halfs and hitches no flatbacks or anything like that. The flyer also has a choice of a heel stretch hitch or a bent leg hitch like the one in the photo. If the flyer decides to do a heel stretch the half have to be fulls. The single base flyer needs to lean forward on the front spot so that the flyers back makes a nice flat surface, a different variation on this I've seen done is the flyer goes up into the single base backwards and then does a back bend using her front to support her and then the outside flyers put their feet on her tummy. Then the two outside groups do straight up extended hitches. The hitch flyers want to place their inside foot on the back of the single base flyer, don't put any weight on her because you will kill her, her base, and her front. You can either regular cradle the outside flyers or outside twist down the outside flyers. These are just some basics on how to do a half to a heel stretch.
