So after having said all of that, in the case of a simple box you can actually squish that around in MoI by using Edit/Show pts to turn on control points, and then select some of the points and use tools like Scale or whatever to edit them.

A box is a special case though, since its edges happen to align with the edges of the underlying surfaces.

Once you get something more complex (including doing a boolean on the box), then that won't work anymore unless you break things apart into individual surfaces like Danny mentions above. Again check that FAQ topic for some more details on this.

- Michael