For each photo, use the quick buttons (0/90/180/270), the slider, the number box, or the ±0.5° / ±1° nudges to dial the watch perfectly straight (dial readable, 12 o'clock at top, crown to the right). Any angle to 0.5° precision is allowed. Type a short note explaining how you decided. Hit SAVE. Annotations land in annotations.json on the server.