Birthmark photos are critical for pole loading analysis and will be used to help measure the strength of the pole. The default shortcut for birthmarks is "i" and will prompt you to enter the pole's height, class, and species. These three attributes will be used later to automatically insert a pole spec for pole loading. If any part of the birthmark cannot be read, you can use the input "unknown" as a temporary place holder. If there is no birthmark at the pole, use the default shortcut 'z' to create the note for no birthmark.