I use Quick Look regularly to quickly view the content of files. Sometime recently the behaviour of the feature on my machine (Mac mini 2018, Big Sur 11.3.1) has changed such that it now only displays a small thumbnail of the images, like this:
This only seems to effect files I haven't opened - once a file has been opened (eg. in Preview) Quick Look correctly shows a full screen version of the file.
I've tried restarting and clearing the thumbnail cache (
qlmanage -r cache) but to no effect. I've also tried forcing Quick Look to preview a dir of images (ie.
qlmanage -p ./*) which works but is very slow when switching images. Once images have been previewed in this way, Quick Look again functions as usual.
What am I missing?