When annotating PDFs, simply saving the PDF and passing it on doesn't always work - some people are stuck with software that doesn't display annotations. A workaround is to print the document to a new PDF - then the annotations are included as normal elements and can be seen in any PDF viewer. It would be great if okular had another page selector for "annotated pages only", so that a long PDF could be restricted to the necessary pages - associating with the original can typically be done easily via the page numbers in the footer anyway. Thanks a lot!