[systemd-devel] systemd login toggle question

[luxInteg]

Greetings

I have a computer running blfs linux//systemd-224/kde

I would like to know  if there are systemd service files that allow a choice 
of logins
( i.e command promt login or graphical login )

In other words executing either

systemctl start systemd-logind.service
( or somesuch for login to command prompt )

OR
systemctl start kdm.service
( or somesuch  for X11/kde login )

so the user can toggle between the two

thanks in advance.

sincerely
luxInteg