To Specify a Shrinkage Formula
1. Perform one of these operations:
◦ On the Mold tab, click the arrow next to Shrinkage and then click 
Shrink by dimension or 
Shrink by scale.
Shrink by dimension or Shrink by scale.◦ On the Cast tab, click Production Features and then click the arrow next to Shrinkage. Click Shrink by dimension or Shrink by scale.
Shrink by dimension or Shrink by scale.◦ In Part mode, specify a shrinkage formula:
1. Click > > 
Model Properties. The Model Properties dialog box opens.
Model Properties. The Model Properties dialog box opens.2. Click change in the Shrinkage line. The SHRINKAGE menu appears.
3. Click By Dimension or By Scaling.
The Shrinkage By Dimension or Shrinkage By Scale dialog box opens.
2. Under Formula, click 
or 
to calculate the shrinkage ratio.
or to calculate the shrinkage ratio.◦ 1+S—Specifies a pre calculated shrinkage ratio based on the original geometry of the part. This is the default.
◦ 1/(1–S)—Specifies a shrinkage ratio based on the resulting geometry of the part, after shrinkage is applied.