Creating in-text citations using superscripted letters

I am not great with footnotes/endnotes, as we rarely use that kind of style in the sciences.  But – I went into the footnote/endnote dialogue and there are settings for the a, b thing, and where the “endnotes” go.  When I tested it, with Chicago 16th A (a footnote/bibliography style) I was able to go back and insert an endnote between two preexisting endnote, and Word re-lettered them in the expected order.  Office 365 proPlus, version 15.0.4805.1003) and EndNote 7.5.  

You can easily convert footnotes already inserted – (googled it)  See image attached.  

To convert all footnotes or endnotes:

  1. Open the document and select the References tab.
  2. Click the Footnote & Endnote Dialog Box launcher (it appears as a small square in the bottom-right corner of the tab). Then click Convert… .
  3. Click OK or Apply .

As for the output style to get what is described.  that is a bit harder - as viewing the footnote output for existing styles is impossible without formatting them.  But the place to start is looking at footnote styles on the endnote websitefrom your area or from your publisher – So if you are in History or Humanities start with those.  Add the publisher to further limit the list you need to look at (I didn’t fill in that field in the link, but you only need to fill in a few letters of the publisher - then hit “apply”).     Once you find something that is close, you can edit it further using the guide you can download from the links here or post the output style you have here (or in the style forum, really doesn’t matter) and what is wrong for further tweaking.  – You will need more information than you provided in the original, for example, other publication types, how to handle multiple authors (if 20 authors, do all 20 show, or only the first x number followed by et al, for example).  In addition to your posting, provide a link to the publishers directions on how to format the references is the best way to provide the information needed, so we other Endnote users can help without doing a lot of research?