Fraction of sources of a given radio morphology (faint, compact, medium, and extended) within each bin of radio loudness. Thumbnails of the LOFAR images are shown in the upper panel to exemplify the morphological classes used here, where two circles are depicted at 3″ (dashed line) and 10″ (solid line). The bars in the lower panel include all morphology classes (each denoted by a single letter). Only ALLQSOs from the LoTSS Deep Fields catalogue (northern fields) were used here due to their depth and better resolution (6″). Error bars represent 1σ binomial uncertainties.