Static vertical sidebar in Github page

Question

I'm trying to set up a Github page and I'm using the Tactile Theme template by Jason Long. I'd like to add a vertical sidebar like the one shown in this page.*

I'm 100% new to HTML, Javascript, CSS and everything related with page development but I know my way around python (a bit) so I'm not completely code illiterate.

All I'd need is to be pointed to the snippets of code and files I must add to the template mentioned above to display such a vertical bar and with some luck I can take it from there.

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*In that page the vertical bar is not static, ie: it hides when one scrolls down the page (perhaps I'm using static wrong, forgive me if I am and please do correct me) and I'd also like it to always show if possible.

Answer 1

You're looking for the position:fixed property.