Hi, you can set PDF metadata with a 'pdf' prefix as described in https://lilypond.org/doc/v2.23/Documentation/notation/creating-output-file-metadata
The PDF Creator should be set to LilyPond {version} even when setting an author. I tested it here: Author: Me Creator: LilyPond 2.24.3 So this is not a bug. Questions about LilyPond usage are better asked on lilypond-u...@gnu.org. Cheers