Community Tip - You can Bookmark boards, posts or articles that you'd like to access again easily! X
Seems like when I add new Pdf's (actually I am adding updates to current PDf's) - the thumbnails are not present. But I'd swear...over a period of time they do generate. See attached. Top are new. Below them are older and you can see the thumbnail. What up?
Take a look at CS Article CS36856: https://www.ptc.com/en/support/article?n=CS36856