In Dolphin, just type this in the addressbar:

man:tar

That opens up a GUI for tar pages that’s much better than even the Windows CHM pages. Since there were more than 1 manual page for tar, it prompts us to choose of the two.

Clicking on it brings up the specific tar page. Far better than browsing via a CLI.

 

Similiar GUI exists for infopages:

Eg:

Open up the man pages for dircolors with:

man dircolors

It suggests opening infopages for full manual:

SEE ALSO
The full documentation for dircolors is maintained as a Texinfo manual. If the
info and dircolors programs are properly installed at your site, the command

info coreutils ‘dircolors invocation’

should give you access to the complete manual.

So the command line invocation for this is:

info coreutils 'dircolors invocation'

The corresponding GUI version is:

info:coreutils/dircolors invocation

You can see it in action here:

Note that the browser which opens by default is Konqueror, which can be controlled with xdg-open.