I'm in the process of creating a "table of contents" for a SharePoint site page (using 2016 SP online) and have managed to do this by internal page links, which when clicked, navigate the user down the page to a bookmarked subheading.
However, I would like this Table of Contents to be available on the side of the page, or "float" as they scroll down, so they don't need to constantly move back to the top every time they want to navigate to a different section.
Is there an OOTB solution, or not to difficult way to implement this?