My posts use footnotes a lot, in ways and for reasons I’ll come to in a moment. But first, and at risk of teaching granny to suck eggs, let me say that clicking on the inline numbered marker …
… ipsum lorem 1
… will take you to the relevant footnote, which in turn houses the means of coming right back.
(And as I’m sure you already knew, gran, hovering the cursor over said inline marker allows you to read a few lines of the footnote without going there.)
Moving from matters practical to those of etiquette and communicative intent, I do know that mine is an unorthodox use of footnotes. In print, especially academic books and journals, these give sources for assertions made in the text. But Harvard protocols be damned, online writing allows that job to be done more efficiently by hyperlinking a claim to its supporting evidence.
Which frees up footnotes for another purpose, also enabled by online publishing: the shielding of detail from those who don’t want or need it, while granting lightning access to those who do.
Have a nice day.