It is a button that you can add VB code too...
You can enter in code like this:
Zmove = 1.5 'amount the tool will move down to hit the probe
Zpos = GetDRO(2)
Tool = GetDRO (24)
ZOffset = .5 'enter height of probe here
OldZpos = Zpos
ZPos = Zpos - ZMove
Code "G31 Z" & ZPos & " F20.0"
Zpos = GetVar (2002)
If Zpos = OldZpos - ZMove Then
responce = MsgBox ("ERROR! The tool did not hit the probe and DRO was not set" , 4 , "Probe ERROR!" )
Code "G00 G53 Z-.1"
This will set the Z to the right height over the part