The -list-annotations operation prints the textual content of any annotations on the selected pages to standard output. Each annotation is preceded by the page number and followed by a newline.
The -copy-annotations operation copies the annotations in the given page range from one file (the file specified immediately after the option) to another pre-existing PDF. The range is specified after this pre-existing PDF. The result is then written an output file, specified in the usual way.
The -remove-annotations operation removes all annotations from the given page range.