To switch the hft between two attached consoles use this excerpt from
the AIX6000 FORUM trying to move the hft from CGA to Gt4:

This has to be done from the "green screen".  If this is AIX 4 and
you've got the desktop running, shut it down.  One way to do this is
to comment out the dt line (afs-dt if you have the afsrcmds installed)
from /etc/inittab and reboot.  Then

    1) do "lsdisp" -- it'll probably say that '2' is the Gt4
    2) do "chdisp -t 2" to move your current hft session to the Gt4
    3) do "tty" to show the name of the session the way "chcons" wants it.
    4) do "chcons /dev/hft/..." or "chcons `tty` " to change the ODM.
    5) reboot and the console should be moved.                         

Actually, the above is a little confusing and isn't what Becky did on
ananda on 3-18-97.  She had to shut the desktop down and reboot, but
after that, all she did the lsdisp and chdisp -d to the other
display, the one that wasn't the default.  She didn't have to change
the console, it's still /dev/lft0.