Annotation techniques are provided. In one aspect, a method for processing a computer-based material is provided. The method comprises the following steps. The computer-based material is presented. One or more portions of the computer-based material are determined to be of interest to a user. The one or more portions are annotated to permit return to the one or more portions at a later time. In another aspect, a user interface is provided. The user interface comprises a computer-based material; a viewing focal area encompassing a portion of the computer-based material; and one or more indicia associated with and annotating the portion of the computer-based material.