This chapter explores the rationales of the paratexts accompanying John Tzetzes’ commentary on Hermogenes in the bespoke copy contained in the Vossianus Gr. Q1. Besides clarifying the circumstances prompting that specific copy of the commentary, these paratexts scaffold Tzetzes’ authorial agency as well as his social role in a cultural economy based on patronage. The chapter also shows how they speak to the way Tzetzes exploits the inherent ambiguities of language and tradition, by looking at them as examples of enacted ἀμφοτερογλωσσία, resting on dialectic.