I have a SharePoint site developed by someone else who's since left and who I have no access to.
The Quick Launch menu has some libraries at the top level (i.e. they look like headers). They also have various other views, and links under those headers. This is handy as the headers (and everything under them) are automatically hidden when the user does not have access to that library (we do not have Publishing turned on btw).
I have no idea how they did this! The URL of the library on the header is set but greyed out so definitely looks like this is the library itself rather than a manual heading.
I have a new library that I want to add in the same way but I'm stumped. I can either add a manual header and put the library under the header (but then the header shows all the time), or I can turn on Publishing and set the audience of the manual header (but not sure of the impact of turning this on).