# Making Proper Marks in Books • Zettelkasten Method **Covers**:: **Source**:: [Making Proper Marks in Books • Zettelkasten Method](https://zettelkasten.de/posts/making-proper-marks-in-books/) **Creator**:: [[zettelkasten.de]] # Highlights ##### ^305310567 highlight_tags:: [[reading]], [[writing]] technique for marking more complex text. ###### ^305310567q I circle terms which are being defined and write a D for Definition in the margin. When the author elaborates a model, I put an M or μ in the margin and maybe highlight key terms she uses. If I spot an argument, I put an A or α in the margin and sometimes draw a vertical line in the margin to designate the passage. Everytime I find a weakness in the argument or disagree due to a different starting point, I put a bolt glyph in the margin. ^305310567