Hello everyone! It has recently become my responsibility to prune the Apple Tree in the attached picture. I have no knowledge of pruning Apple trees except that the vertical limbs are referred to as "suckers" and should be lopped off. Well, almost ALL of the branches are vertical so what now? I understand that the tree was pruned 7 years ago so these branches are well established. Should I lop them all off? (Vertical shooters) Hope you can see enough detail as the contrast is not great. I can go back to the property if necessary and take a better picture. Thank you.