How do I stop the constant spinning of the liitle ball in the left lower corner? It is constantly regenerating/preview extractions thumbnails which is slowing my editing in ACR down to a snails pace. What is the best setting for this? I do not need the machine working on thumbnails I am not working on. I tried splitting the folder as it had 2700 RAW files within. It hasn't helped, still constant spin.
Well there is no option to stop the regenration process, however we can increase the cache size for the thumbnails edit> preference > Cache.
I assume you're talking about Bridge. Click the second chequerboard icon from the left in the toolbar, and select 'Prefer Embedded'. Bridge will them use embedded previews from image files instead of running Camera Raw to generate HQ previews. Alternatively, you can click the first icon to temporarily disable HQ preview generation.