In R77.30, you have the option to print the open policy (File --> Print --> Rule Base). We used this for sort of a fail safe backup of old policies by printing to PDF (and yes, I am aware of the limitations of this, e.g. doesn't show what is in a group, etc.).
I looked in R80.20 SmartConsole and I do not see this option. Am I missing something or is this feature gone? I do see you can export the policy to CSV, and that may be an option, though it's not the prettiest output.