Many man pages end with:
The full documentation for Ed is maintained as a Texinfo manual. If the info > and XYZ programs are properly installed at your site, the command
info XYZ
should give you access to the complete manual.
I have problems with that.
1. I don't want to install unneeded packages just to find out whether or
not the package might be useful.
2. The info output has an annoying format. A browser acceptable format
{plain text fine -- HTML *NOT* needed} is MUCH more functional.