[newbie] where is the login setup?

[Larry Marshall]

Hopefully there are still a few Linux experts here in spite of the takeover by
the political pundits.

I mentioned that I had installed Helix-Gnome last night.  What I didn't realize
was that in doing so I changed not only the shell I was using but also the
entire login sequence.  Where is this stuff configured?  I've just spent the
last too many minutes hunting for it and I can't find it.  Can anyone provide
me with a pointer?

Cheers -- Larry