Prune or tie. I prefer to tie because I do not know how to prune and I do not like snipping because of shock. Start bending the main cola or stalk slowly but surely with an elastic band or a soft material and stake it to a steadfast area. Each day bend it some more. You want to start easy on them because bending them too much can cause them to suffer - loss of nutrients going through the flesh from being cut off and even splitting the flesh so take it easy. You can bend the branches that way too. Somebody on here is probably really prolific in pruning if you prefer that. Eventually the bend will be low and the light will hit those portions of the branch that are exposed and the buds will grow upwards from there.