I am using the default on MacOS which is Preview, though I doubt the situation is any different for Linux or Window. I would be highly surprised if any default pdf viewers auto reload when the pdf is modified or recreated. A refresh button would be a better option only if I could tie it to a shortcut , because the process of navigating to the menu to press refresh is as time consuming as double click to reopen it. Preview has no refresh button as far I can tell.�