Q - How do I make my diameter and length offset number match my
tool numbers?
A - From the Main Menu select Settings > Machine Definition
Manager.
Click on the Contron Definition icon.
In the Control 
Definition select the Tool topic. In the Tool offset
register section set the radio button to Add to tool. To have the
Length and Diameter match the tool number set the value to 0. If
you need the Length and Diameter to be different then simply enter
a different number in one of the fields and that will be added to
the tool number. With the settings shown on the right you would
get:
Assuming thetool was tool number 3 and the control was Fanuc
based.