Writes between the lines?

• Adds extra info to
• Writes on music paper
• Symbolically writes refusal to family of philanthropists?
• Jots down
• Puts on the staff?
• Writes, eg, musical symbols
• Marks up, as measures
• Adds marginal comments

Wiktionary Word definitions in Wiktionary
vb. (en-third-person singular of: notate )