How can I hide this bar


I'm trying to hide the bar that shows up on top of the lister just below the toolbar. I've got no idea what it is called so I was unable to find anything in the forum.
This is what I mean:

Any ideas?


Typical - as soon as I post I find what I am looking for:

It's in the preferences under "File Displays" - "Border" and then select "Display as a static header"