Suggestion:
Clicking on a footnote indicator (number in blue superscript) gives only minimal information, e.g., "Beale, p. 788". There's no way to easily get the complete citation, especially if the reference doesn't exist in the library.
Rather than having the citation disappear when the mouse pointer is moved, allow user to click on the brief citation to see the full bibliographical reference, e.g., "Beale, Gregory K. The Book of Revelation: A Commentary on the Greek Text. The New International Greek Testament Commentary series. Grand Rapids: Wm. B. Eerdmans Publishing Co., and Carlisle, England: Paternoster Press, 1999." Let that disappear when the mouse moves off from it.
Even better would be to make the reference a link to the actual citation if the book is in the user's library.
Thanks!