obelism
Annotation – Item of metadata attached to a document
Aristarchian symbols – Marks to annotate ancient Greek texts
Dagger (mark) – Symbol († ‡) for footnotes etc. A horizontal form of the dagger mark was used an obelus.
Diple (textual symbol) – Symbol used in margins of Greek manuscripts to draw attention to something in text
Marginalia – Marks made in margins of book pages
General Punctuation – Unicode block containing punctuation, spacing, and formatting characters