[CentOS] need info for X11 keybindings for CentOS7

Hello all--

It seems using ctrl-alt-F1 to exit from GUI back to MY OWN SESSION'S 
command line does not work for me. It does nothing.

Is this something that needs to be explicitly enabled? I start GUI using 
"startx".

Also, any info on what to use to get BACK to my X11 session. Discussions 
seem confusing on this point.

Thanks for any help.

-- 

"And in the end, only kindness matters."
    -- Jewel, "Hands"
______
Kay Schenk