The material is the difference. A paper flag creases and tears where the page turns; a film flag keeps its shape through months of a manual being opened at the same point. Colour carries the meaning, so keep the scheme small and documented. Repositionable adhesive lifts cleanly from an original. See page markers, message flags and sticky notes.

Post-it tape flags marking sections in an office manual on a bright desk with sticky notes and stationery.
Tape Flags for Documents and Study

Shop tape flags and page markers for reports, books, filing, studying, reviewing and colour coding.