It sounds like you are using an Adobe plugin or Adobe product to interact with Notes that allows conversion to pdf format, as that is not a property/function of the native Notes application.

You probably will need to contact Adobe for additional assistance on their product for these questions, however, there may be some assistance via the internet you can search for.

When I tried that I found a few articles like the ones below that might assist you towards these question,

http://help.adobe.com/en_US/acrobat/X/pro/using/WS9C160D36-D4E6-4ac5-B27E-48E2FF6CDE52.w.html

http://ipo.info.yorku.ca/files/2013/03/How-To-Save-And-File-Lotus-Notes-Emails.pdf

https://helpx.adobe.com/acrobat/using/creating-pdfs-pdfmaker-windows.html#convert_a_file_to_pdf_using_pdfmaker