I'm using Dolphin in Kubuntu 22.04. I have a folder containing some JPEGs. Each one shows up as an icon. I want to see them as thumbnails (previews) instead. I've gone to Configure Dolphin / General / Previews and checked JPEG Images, but that has no effect.
I think I did this successfully (and straightforwardly) several years ago, so there may be a bug introduced in the interim.
Update 1: This behavior varies according to the environment! See Dolphin behaves differently on two laptops with the same software
