Margin

Enables quick navigation of PDF textbooks with an interactive map linking notes to questions

Enables quick navigation of PDF textbooks with an interactive map linking notes to questions.
Lets users add inline notes and scratchpad annotations directly on the PDF.
Affordable one‑time purchase ($39, $19 for students) for Mac users.

Study PDF textbooks on your Mac with inline notes, scratchpads, and a map that takes you back to your questions. $39 once. $19 for students.

Price: Paid
Category: Productivity
Discussed on Hacker News (1 points)
First seen by Liz: 2026-09-17

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Opening Liz…