Searcher wrote:
Double click on the image (centre of the grey area) to enlarge. That should kick off the preview rebuild. If that does not work, report back here.
Also check your catalogue settings, Edit > Catalog settings > File handling tab.
Try changing the Standard Preview size to 1440 pixels, Medium Quality
I changed to 1440. When I click on thumbnail in the develop mode the thumbnail comes up but when I download another card I have to gothru and click on each pic individually?