Use this procedure to remove a ring from a material boundary.
A material boundary can consist of more than one closed ring. You can individually remove each ring.
Note: You cannot remove the last ring from a material boundary.
Select a 2D elevation.
Click 2D Section/Elevation tabMaterial Boundary panelEdit In Place.
The material boundary is highlighted and edit-in-place grips are displayed.
Click Edit In Place tabProfile panelEdit Material Boundary.
Click Edit In Place tabProfile panelRemove Ring.
Select the ring you want to remove.
Click Edit In Place tabEdits panelFinish to save the changes you made, or click Edit In Place tabEdits panelCancel to undo the changes to the material boundary.