To Make a Mass Element Subtractive

Use this procedure to change the operation of a mass element. When a mass element in a group operates by subtraction, the mass element subtracts its mass where it overlaps another object.

1. Select the mass group that contains the mass element you want to change.
2. Select the Edit In Place grip.

   Alternatively, you can click Mass Group tabModify panelEdit In Place.

   
3. Select the mass element you want to make subtractive.
4. Click Edit in Place tab Modify panel Mass Group Operation drop-down Subtractive.
5. On the Properties palette, expand Basic General.
6. Select Subtract for Operation.
7. Click Edit in Place tab Edits panel Finish.

   This saves the changes to the mass element and ends the in-place edit session.