Trim Surface - Removing Surfaces Use the Mutual option of the Trim Surface tool to remove extraneous faces. The Mutual option uses multiple surfaces as mutual trim tools. Click Trim Surface on the Surfaces tab. In the PropertyManager, under Trim Type, select Mutual. Select Surface-Knit2 and Body-Move/Copy1 in the graphics area for Trimming Surfaces . Surface-Knit2 Body-Move/Copy1 Select Remove selections. Click Pieces to Remove and select the faces shown. Body-Move/Copy1 Trim1 Surface-Knit2 Trim1 You can select the faces for Pieces to Remove in any order. The list that appears in Pieces to Remove is based on your selection order, not on the entity you select. Click OK . Before After Parent topicSurfaces Previous topic Move/Copy Bodies - Moving a Surface Next topic Extruded Surface - Creating a Trim Tool