To make linked footnotes [1], add the following (in text mode) just before your footnotes:

</pre>
<h4 id="footnotes">Footnotes</h4>
<pre>

Now you need to link each footnote number in the text by using the link of your post and suffixing it (after the /) with

#footnotes

To see an example hover your cursor over or click any linked number in the text and notice how the url of the post changes. It’s a manual labor but I think it’s sometimes worth it.

Footnotes

[1] Creating Footnotes in WP https://lorelle.wordpress.com/2013/02/26/creating-footnotes-in-wordpress/