Manually copes and snips member parts based on objects and planes that you specify. Use this command when assembly connections are not sufficient to resolve the interference conflicts due to the position, orientation, and complexity of the intersecting members. You can place a trim and an assembly connection at the same member end. However, the results of the trim might be overwritten by the assembly connection results making the trim redundant. Both the trim and the assembly connection are listed in the Workspace Explorer under the member part.
What do you want to do?