Not knowing how Skim works, I can not say where the annotations are stored. If done right, they become part of the PDF document when saving it.īecause dealing with annotations in PDF is not that a simple task, some vendors store the annotations outside of the PDF in a proprietary format, as Skim seems to do. Is there a common standard of PDF notes?Īnnotations are part of PDF (see ISO 32000), and have been so since about PDF version 1.1 or so, which corresponds to what Acrobat 2 could do.I think the PDF format is designed for reading instead of editing, annotations may be an unwanted action to PDF file.The notes may be lost due to different implementations of notes, or during sync among iOS and Mac OS Is it safe to make notes in a PDF file?.But I am worried if the 'Preview.app' has a risk of losing notes. I will definitely stop using Skim due to its proprietary note format.
Now I am more concerned about the approach of making notes in a PDF file. I have lost half a year notes and I don't know whether there is a chance to find them. after a restoration, all files sync by Dropbox were downloaded from Dropbox instead of restored from Time Machine. The Time Machine restoration does not involve Dropbox, i.e. First thing first, I have just lost all my annotations and notes in PDF files.Īfter a restoration by Time Machine, I found all annotations and notes generated by Skim gone.
