Use Remove Details, Fill Voids, and Define Envelopes to simplify a part.
Use Remove Details to remove recognized fillets, chamfers or custom-selected faces.
You must have one or more solid bodies in the file to use the tool.
Use Fill Voids to remove any internal spaces of the geometry.
Use Define Envelopes to remove geometric complexity from the exterior shell of the included parts.
Set the selection priority to Select Components, Select Parts, or Select Parents.
The simplified envelopes populate the browser. If you want to redefine an envelope, delete it (context menu or delete key) and define a new envelope.