Abstract: A user may be enabled to annotate a portion of a document through inking using touch inputs, such as a finger or stylus pen, gesture inputs, voice recognition, and/or eye-tracking, for example. The annotation may be recorded in a form of a comment card associated with the portion of the document. One or more annotation control elements may be provided in conjunction with the comment card to enable the user to perform various functions associated with the annotation and/or comment card. The document may then be displayed with one or both of the annotation and the comment card, such that the document may be re-used for presentation if desired. In some embodiments, the user may be enabled to playback the annotation on the displayed document and modify and/or delete the annotation during the playback. The user may further be enabled to annotate the portion of the document during a presentation.