This month’s Trail Pack explores a part of scholarly publishing that is everywhere—and rarely examined: instructions for authors. Featuring two foundational 2018 studies by Marilyn Oermann and colleagues, along with a new original essay written for this Trail Pack, this collection revisits how journals communicate expectations to authors and how that guidance functions as editorial infrastructure. What has changed since 2018? What has intensified? And what remains structurally the same? The Trail Pack also includes an exclusive video interview with Marilyn Oermann reflecting on the studies, their continued relevance, and what editors and authors can do today. Together, these materials invite us to see author guidelines not as administrative paperwork, but as one of the most important—and most overlooked—sites of editorial leadership.