1. Select the text of the paper you need to annotate.
2. Click "References" in the menu bar, then "Insert Footnote" or "Insert Endnote".
3. Open Insert Footnotes and Insert Endnotes and enter the content of the comments.
4. After clicking the endnote symbol, click the small tab in the lower right corner of the "Footnote/Endnote Dividing Line" in the menu bar, you can set the numbering format, custom marker, starting number and numbering method of the note according to your own requirements.