Our system administrator polarkernel introduced a new feature that allows one to nicely print PO threads or parts thereof.
The printer friendly layout displays the desired posts' content, but not the decoration around them, ready for printing. Thus it is an ideal way of archiving important discussions for external use.
You may access the printer friendly layout by clicking the printer symbol at the left of the question's title. The resulting web page contains at the top a button that brings you back to the original view of the question and a second button ''Remove all controls'' explained below. In addition, it contains at each comment and each answer a control button that allows you to hide particular comments or answers, in this way selecting the desired amount of output. (Any hide can be undone by pressing the reshow button replacing each hide button pressed.)
After having selected the desired output (or directly in case everything is of interest), pressing the ''Remove all controls'' button at the top removes all buttons. The page may then be printed to paper or to pdf using the standard printing features of your browser. (Hovering your mouse pointer over the empty area on the right of the PO logo brings all controls back if needed.)