I am currently creating georeferenced PDF maps using a mapping program, I have no issues opening the PDF with Adobe Reader/ Acrobat. I use Adobe Acrobat to add markups and comments to the PDF map and I can still view the markups and comments when I re-open the file with Adobe Reader/ Acrobat. However when I try to open the file on Avenza, the markups disappear. Does anybody know how I can save the markups and comments so that they appear when opening the file with all Apps? Perhaps this is a question to be asked for the specific App in question - Avenza. Thank you for any input.
3rd party software may or may not support what Acrobat Reader on mobile supports. If content does not appear, then your non-Adobe software likely does not support that content. For example, many PDF viewers don't support forms. However, that's a question you must ask of your 3rd party software vendor.