HI. My InDesign 2015 has started running extremely slowly - to a point where I can hardly use it. Every minute or two I get the spinning wheel of death. Thought it might be something to do with the start-up disk, so I've backed up and deleted lots of stuff - still the same problem. It's up to date on all updates. Any ideas?
One thing I always do is disable Live Preflight. Use the following link for how to do that, and other tips that may speed up InDesign. I know it was written for CS5, but the concepts are still applicable. Slow performance in InDesign
I seem to remember that the Pages Panel’s »Show Thumbnails« (under Panel Options) can also be a drag on performance.