It's likely that the generated PDFs don't have appearances for the check boxes. Without appearances, the viewer doesn't know what to show ... ... <看更多>

For that you need to install a PDF preview "add on" in Chrome. Automatically previews pdfs, powerpoint presentations, and other documents in Google Docs Viewer. ... <看更多>

I really would like a PDF reader that saves the open pdf files in tabs, like a browser does. It would let me get back to reading whatever I was ... ... <看更多>