Why is the title font in my Windows 10 programs enormous?

Recently, the title bar on my Windows 10 programs has been displaying in a larger font size. For example, if I fire up Notepad, it looks like this:

Where it says "Untitled - Notepad," the font is MUCH larger than what I'm used to. Any idea why?

Looking through my Display settings, the only thing I notice is that I have everything scaled by 250%. But that is the recommended setting for my monitor resolution, and it's been that way for a long time.

Thanks for any suggestions!

UPDATE: I tried turning off the 250% magnification. Everything got smaller, but the title text is still much larger than usual -- basically a scaled down version of my earlier screenshot.