Basically, annotating is reading the Article, Paragraph and such and making a more condensed summary of it.
Ex:
After breakfast, which was five drinks for Ragnor and seventeen for Magnus, Magnus took Ragnor on a tour of Lima, from the golden, curled, and carved façade of the archbishop's palace to the brightly colored buildings across the plaza, with their practically mandatory elaborate balconies, where the Spanish had once executed criminals.
Annotation:
After Breakfast, Magnus took Ragnor on a tour of Lima, showing him the beautiful and cultural part of the city.
