How to download a thread?

Is there a way to download a thread to a PDF? There is a long thread I want to save and CTRL+P only get a fraction of it.

Is there a “thread tools” button to show a printable version of a thread? An old answer says there is one in the “gray bar at the top of the page” but that was in 2012 - there is no gray bar at the top of the page.