To show all deformers

1. Select Display > Show > Show Deformers > All.

   You can also show all lattices, sculpt influence objects, cluster handles, nonlinear deformer handles, or wrap influence objects.

To hide all deformers

1. Select Display > Hide > Hide Deformers > All.

   You can also hide all lattices, sculpt influence objects, cluster handles, nonlinear deformer handles, or wrap influence objects.

To display intermediate deformation object(s)

1. Select the object(s) being deformed.
2. Select Edit Deformers > Display Intermediate Objects.

To hide intermediate deformation object(s)

1. Select the intermediate object(s) being displayed.
2. Select Edit Deformers > Hide Intermediate Objects.
3. Change the deformer.