add reply indesign notes

I think (seeing the image above) you are refering Acrobat PDF notes, that can be responded in the PDF file.

If you want to create notes embeded in your text/frames in Indesign and to be able later to see those same notes as a PDF using acrobat reader, do this:

1. Create as many notes you want in your indesign file, clicking on the notes tool and placing them in your text;

2. Save the file as an indesign document and do not export to PDF (this option, at least until now, doesn't let you pass the notes to PDF);

3. Use instead InCopy app to open the indesign file and export to PDF (an option there permits to embed every notes on pdf to be converted in acrobat pdf notes;

Hope it helps.

What kind of notes? Footnotes? Notes? What is a 'reply for InDesign notes'?