I noticed that on Plasma 6, my png images 400x400 don’t have miniatures in Dolphin. I know there is some config to change that but all these years, there have been no GUI access to that. Because for Plasma 6 update I had to delete my old Plasma configs, I get some default. In this case, it doesn’t work for me.
I create some small miniatures 400x400 to have good site performance (no need to have higher res), and it’s confusing for me, if I don’t have miniature preview on the file. I guess for most people default upper and lower limits make sense, but not for everyone or every case.
I’d wish that KDE/Plasma config structure was not such a mess. It’s no fun to hunt for certain feature that is GUIless. I hope someone remembers or can find the proper config quicker than me.
Thanks
There is a setting for the upper file size limit for which thumbnails are generated. This is available in the Dolphin settings and unlimited by default. There is no config for a lower limit for file size or resolution.
I verified again, it seems if you put that image inside Desktop folder, the preview will succeed below 144px zoom, but will fail for any zoom value greater or equal than that.
And if you put that image in a folder different from Desktop, the preview will always fail no matter what zoom you apply.