Click a tooth in the 3D view to select it. Pick a condition below the 3D view, then click a tooth surface to mark an issue.
Marks and notes save automatically in this browser. Paint swatches draw directly on the tooth. Double-click a tooth to show it enlarged on its own; double-click again (or press Esc) to return. Surfaces: O = occlusal/incisal, M = mesial, D = distal, B = buccal, L = lingual.