To Adjust Feature Depth
1. In the Machining Feature dialog box (for example, Profile Feature), click 
next to the Adjust Feature Bottom element.
next to the Adjust Feature Bottom element.The system opens the Define/Adjust Feature Bottom dialog box.
2. Use the following options in the Define/Adjust Feature Bottom dialog box:
◦ Offset below walls—Type an offset value below the bottom of the stock (or below the bottom of the feature Hard Walls, for No Stock machining).
◦ Use Datum Plane—Select a datum plane normal to the z-axis of the Program Zero coordinate system.
◦ Offset from Program Zero—Type a value along the z-axis of the Program Zero coordinate system.
◦ None—The feature Floor coincides with the bottom of the stock. This option is not available for No Stock machining.
3. Click Preview to highlight the surface currently defining the feature depth in cyan.
4. Click OK to return to the machining feature dialog box.