Do minimal install according to
    http://vger.kernel.org/~davem/chromebook_pixel_linux.txt
except use external optical drive with minimal CD image
    (I used local repository source.  Would like to try setting network source).
At this point (maybe permanantly?) need to reboot with CTR+L then 0 every time.
update packages:  yum -y update
Install KDE:  yum -y group install "KDE Plasma Workspaces"
Maybe unnecessary: echo 'exec startkde' >> ~/.xinitrc
Enable gdm (kdm not available for Censo) per
  https://tranduyhung.joomla.com/20-enable-graphical-login-in-centos-7:
    systemctl enable gdm.service
    systemctl set-default graphical.target
  (He says can back out with:
  sudo systemctl disable gdm.service
  sudo systemctl set-default multi-user.target
  )
Defaults to X resolution of 2560x1700p.
  Use Computer > System Settings > Display and Monitor to change to 1280x850.


X resolution attempts
"Chrome OS Dev users can now turn on the native, full 2560x1700p resolution.
KDE chooser doesn't allow choosing above default.  Can try + + "-" to switch
  between resolutions (probably only works with ChromeOS).


TODO:
  Decrease X resolution
  Decrease text UI resolution

I gave up.  Can't remember now what wouldn't work.
I think it will not boot up successfully on the Centos installer boot image.