P-values from two-tailed t-tests to assess the statistical significance of differences in the shape distributions (c, circles; e, ellipses; u, U-shapes) of (i) CS-EYFP-GABARAP vs. CS-EYFP-LC3B (various size classes), (ii) different size classes of CS-EYFP-GABARAP, (iii) different size classes of CS-EYFP-LC3B, and (iv) CS-EYFP-GABARAP or CS-EYFP-LC3B structures classified in wide-field vs. SMLM. P-values are indicated by shading and typeface (≤0.01, dark grey and bold face; ≤0.05, medium grey and bold face; ≤0.1, no shading and regular face) for ease of orientation.