I am wanting to view more information on the Groff Macro Packages through my Man Page viewer. However, when I try to see them, they do not work.
➜ man groff
# [...works as expected...]
➜ man 7 groff
No manual entry for groff in section 7
➜ man 7 groff_man
No manual entry for groff_man in section 7
Where do I find that macro package documentation or what packages do I need to install?