Recovering the "Low disk" / "Disk full" popups?

Michael <[email protected]> Fri, 29 Nov 2019 19:11:43 -0800
Newsgroups gmane.comp.macosx.general
Message-ID <[email protected]>
How do you recover the low disk/disk full popups? This is on 10.9.5.

As in, I'm typing in a document, the popup comes up, steals key focus, grabs a spacebar and a return before I realize it (because I type quickly), and then the popup notice is gone.

How do I get them back?