A Mixed Media Reality (MMR) system and associated techniques are disclosed. The MMR system provides mechanisms for forming a mixed media document that includes media of at least two types (e.g., printed paper as a first medium and digital content and/or web link as a second medium). In one particular embodiment, the MMR system includes a method, system, and computer program product for adding a hotspot to an imaged document. A source document is converted to an imaged document, from which features are extracted. Hotspots are added to the imaged document, and the imaged document, hotspot definitions, and the feature representation are stored.