Disclosed herein is an ability to create segments of content, such as video, audio, multimedia, image, animation, interactive, etc. content, to associate metadata to each segment created, and to generate a summary of content comprising one or more segments using the metadata associated with the content segments. One or more acticons represented as icons in a user interface displayable to a user can be used to indicate a starting and/or ending point for a content segment. An acticon can represent an occurrence in the content, or a reaction of a user experiencing the content, for example.