Hypertext comprehension often suffers from inadequate representation of the text's structure. Explication of the local paragraph macrostructure within each node might help to overcome this obstacle. As headings show several deficits, especially in digital text, marginalia are considered a promising alternative in signaling hypertext structure as they should foster interactive processing. 41 participants learned with a hypertext with identical macropropositions presented as either macropropositional marginalia (EG1), paragraph-initial topic sentences (EG2) or with an unsignaled placing of the macropropositions at the end of each paragraph (CG). All three experimental texts contained identical information. Results revealed increased inference performance for marginalia and increased factual recognition for topic sentences, confirming the assumptions that marginalia foster interactive processing but suffer the same oversignaling deficit as headings concerning the processing of factual information.