Markdown for the footnote link1:
Markdown for the footnote link<sup id="a1">[1](#f1)</sup>:
1 This is the footnote markdown:↩
<b id="f1">1</b> This is the footnote markdown:[↩](#a1)
When the file only have a single footnote, you can use an * instead (which I think is not possible using proper markdown):
Like this*:
Like this<sup id="a2"><b>[*]</b>(#f2)</sup>:
* With this as the footnote:↩
<b id="f2"><sup>*</sup></b> With this as the footnote:[↩](#a2)