To Unstamp Edges
1. Click > > 
Unstamp Edge. The Unstamp Edge dialog box and the FLATTEN EDGE menu opens.
Unstamp Edge. The Unstamp Edge dialog box and the FLATTEN EDGE menu opens.2. Perform one of the following operations:
◦ To automatically unstamp all features, click Flatten All and Done.
◦ To manually unstamp selected features, click Flatten Sel, select features in the Model Tree or graphics window, and then click Done Refs.
3. To manually override volume calculations:
a. Click Modify Vol.
b. Click a Volume Dimension ID to modify.
c. In the graphics window, type a new value for the dimension.
d. Click Done.
4. Click Done and then OK.