How to Prune Malus domestica 'Jonathan'?
Prune according to chosen training method. See apple pruning

Malus domestica 'Jonathan' · Malus domestica 'Jonathan'
Thrives in deep, fertile, moist but well-drained soil in a sunny, sheltered position. Will not thrive on very acid soils, shallow chalk soils or with shade for more than half the day. Tree height will depend on the rootstock and training method. May require fruit thinning to improve fruit size and quality. See apple cultivation
Prune according to chosen training method. See apple pruning