[SOLVED] MATE DE- no photo thumbnails

I just installed Manjaro(manjaro-mate-23.0.1-230921-linux65.iso) on my main rig, Debian resides here on another partition. Anyway, I've been a long time MATE user, but haven't found a way to enable thumbnails for my photo files. In other distro installs when a "no thumbnail" situation existed, it was a matter of selecting "show thumbnails-always" in File Mgmt Preferences. One time in a Fedora install there were no thumbnails for video files, but installing ffmpegthumbnailer did the trick.
Could it be that there's a pkg that is missing?

Edit: Changed the "only for files smaller than" setting from 100KB to the maximum of 4GB. [SOLVED]