Enable "Touch Off" Button [Solved]

You have to home before you can MDI or touch off.

JT

"Touch Off" is equivalent to G10 L20 (when you select a coordinate system).
You can't do that until all the joints are homed. It isn't clear whether your system knows how to home all the joints, your image seems to only show one joint moving.

if your actual robot has absolute encoders (and many do) then you can set an INI parameter ([TRAJ]NO_FORCE_HOMING ) so that you do not need to home:
www.linuxcnc.org/docs/html/config/ini-config.html#_traj_section

However, even when homed you will _still_ not be able to touch-off, because G10 works in XYZ World space, not 0,1,2,3 Joint space. So, when you are homed, you also need to switch to World mode.
You can do that from the Axis menu, or with the "$" shortcut. Yes, I know that not all keyboards have a $ sign, I have one on one of my machines, luckily that machine runs trivkins.

In Joint mode you will see the individual numbered joints. In World mode everything will switch to X, Y, Z.