Well, this is odd.
A while ago, the NIV started displaying all the morphological stuff that I don't use, and don't even know how to use. So it's just clutter on the page. I just want to read the plain text!
No, I don't have any of the interlinear things turned on, as you can see from the screenshot below.

I've obviously hit some kind of switch to show all that, but I have no idea what.
Thanks for giving clues to the clueless.