For internal use only, when one is creating a file, I think it would be helpful to have the option to be able to right click on any folder within a vault and have a choice to highlight that folder. In this manner, when someone has a really large vault (for example, someone wants to buy a Obsidian Publish for a single vault, and therefore condenses all their work into a single vault it becomes extremely large), they can highlight the main folder for each specific section of that vault to make it easier to find when scrolling through a large vault.
The same way one can right click and insert a highlight into a note, it would be convenient to simply right click on a folder within the sidebar and choose the option to highlight that folder. It wouldn’t need multiple colors (though, depending on the length of one’s vault, multiple colors could become useful, as well), just simply being able to highlight each main folder of a category within a vault will make it easier to scroll through and know if you’ve scrolled farther than intended because the highlight will stick out.
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