Why doesn't it come out to change DE?

Question

linux

I have Antergos GNOME. I'm trying to change to XFCE. I installed the xfce4-goodies package, but xfce did not appear in the choice of DE (where I log in). How to be?
By the way, I also wanted to know why I have a whole bunch of gnomes there (in the DE list) and how do they differ?
GNOME
GNOME
GNOME on Xorg
Classic GNOME
Session

Answer 1

You need to install xfce4. xfce4-goodies is just a collection of programs.
https://wiki.archlinux.org/index.php/Xfce#Installation

Answer 2

Add or edit GDM sessions

Answer 3

And nothing to change for now. Is xfce4-goodies the complete XFCE package?