cpdf -list-annotations in.pdf [<range>]
cpdf -copy-annotations from.pdf to.pdf [<range>] -o out.pdf
cpdf -remove-annotations in.pdf [<range>] -o out.pdf
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. See Section 1.16 for more information on text encodings in the output of this operation.
cpdf -list-annotations in.pdf > annots.txt
Print annotations from in.pdf, redirecting output to annots.txt.
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.
cpdf -copy-annotations from.pdf to.pdf 1-10 -o result.pdf
Copy annotations from the first ten pages of from.pdf onto the PDF file to.pdf, writing the result to results.pdf.
The -remove-annotations operation removes all annotations from the given page range.
cpdf -remove-annotations in.pdf 1 -o out.pdf
Remove annotations from the first page of a file only.