The cusp height and stepover are linked on finishing dialogs. Entering a Stepover value automatically calculates the Cusp height 
. Similarly, entering a Cusp height automatically calculates the Stepover value.
To see this effect, see the main page of any finishing strategy that uses a Stepover, such as Optimised constant Z finishing.
Click 
to automatically define the stepover from the tool geometry.
The extra border round the Cusp height field 
shows that it has been calculated automatically, and not entered by you.
Change the Stepover value to 5.
You can see that changes to 
as the value was manually edited and the Cusp height value has changed.
Change the Cusp height value to 3.
