What would be causing this funky prefs display?

[Moof1904]

My System Preferences has recently started appearing with a funky, magnified icon for the Startup Volume. (See below.)

What could be causing this? Are there some Finder prefs or something that I need to toss?

TIA

 

[iMeowbot]

There was a recent thread covering the exact same problem. Answers are there.

 

[Moof1904]

Thanks! I'll go check it out.