These need to be separated from the main body of the text, and are best set with a smaller size and possibly event a different typeface and colour. The idea of any notes is that it is supplementary information and it is entirely optional that the reader even bothers to look, so setting in a style that does not distract from the flow of the reading experience is important.
Endnote: Comparing Footnotes and Endnotes: Which is Better - FasterCapital
How To Insert Footnotes In Microsoft Word (And Endnotes!)
Sidenotes Peter Kahrel
Endnotes
PagetoScreen
Accessible PDF footnotes and endnotes using JavaScript - ADD
PagetoScreen the web site where Chris Jennings displays his stuff
Sidenotes In Web Design ·
How to write notes on the margin of a word file - Quora
Sidenotes Peter Kahrel
PagetoScreen
jQuery Footnote Plugins
