When annotating books, readers have several different highlighting color options (pink, blue, yellow, green, etc.), but the reader is unable to assign specific meaning to them. As a diligent color coder, I believe very strongly in the organization that color coding provides. That organization is meaningless, however, without a legend defining what each color means. For instance a user could set the pink color to mean that the highlighted passage is romantic in nature, the yellow indicated an important plot development, and the blue is a passage that speaks to the reader in a personal way. Being able to customize what each highlight color option means would be one way that kindle could take the user’s annotating ability to the next level. This could be done by putting the first letter of that category name in the circle of the highlights color. For instance, if I set pink as romantic, then the pink circle would have an "R" inside. This would also allow users to filter all of their highlights more efficiently by being able to skip down to that category of highlights. This would be especially helpful for students who need to do close reading for literature assignments, or PhD students reading up for dissertations and other persons who need an enhanced note-taking ability.