Edit: submitted as an Enhancement Request, #108284. If this would benefit you, too, please endorse it.
Hello,
Has anyone been able to add a textbox to the top of a List, something like the second image below?

We have a number of complicated reports that are used for very specific purposes, but we spend a lot of time explaining these outside of the system. In the case above, we present users with two different tabbed Lists: one showing all resources who are currently terminated and a second showing all Term actions to account for people who may have termed multiple times over the years. We want to be able to explain this to users without them needing to look up explanation emails from us or refer to guides that speak to the difference.
We're trying to find a way to add a text box/Description field to the top of a list that allows us to type some information in so that it's right in front of the user when they're reviewing the list. I've tried doing this both on a single list directly as well as combinations of Panels/Pages but I haven't found any way to do it. We can certainly add text boxes to Forms and such but, on a List or tabbed Page, we haven't had any luck.
Thanks for reading,