1) Are you sure that you are using each time a "Text Box" comment, or do you sometimes use the "Typewriter" comment ?
It can also be that you are using a very old version of PDF-XChange Viewer.
The most recent version is 2.5.322.8 but its further development has been stopped years ago (keep reading).https://www.tracker-software.com/produc ... nge-viewer
2) With PDF-XChange Viewer, you can only add text in form of "Comments", also called "Annotations" or "Markup".
These items are NOT part of the base-content of the PDF.
So, when you print a PDF and you also want to print the "Comments", then, in the "Print" dialog box, below "Advanced Print Options" at "Print", you must make sure to select "Document and Markups" or even better "Whole Content".
NOTE: Like I said before, PDF-XChange Viewer has become obsolete, and has been replaced by PDF-XChange Editor ?
You can download this software, install and try it out for free. Only, when you are using some of its licensed features, you will get publicity stamps on the pages of your PDF.https://www.tracker-software.com/produc ... nge-editor