I have some PDF files to which I want to add some annotations (by adding some TextBox with arrows like I can do on Microsoft Word, for example). So the idea is to open these PDFs, add this TextBoxes with arrows, and save again as a PDF.
I have read that this can be done by opening PDFs on LibreOffice Writer, but when I try to do this, the PDF is open on LibreOffice Draw, and I can't found the option for doing this on there.
I have also read about using AdobeAcrobat, but I don't have this software and have no experience with it, and also I'm looking for a free solution.
My computer is Windows 7 based.