I have a drawing where I want to change the orientation of what is displayed in the viewport.  In Model space I have a few blocks that were brought into my drawing.  These blocks are small squares that are filled in.  I am not sure how they are filled in, but it isn't a Hatch.  (I can select this "filled in" part and GRIPS show up on all four corners. With these grips you can select and adjust the size of this "filled in" area.)  Anyhow, my problem is this.  When I use the DVIEW command and TWIST the viewport, the filled in portion of these blocks disappears.  All I have is an outline of a square.  It is imparative that I orientate the viewport and it is also imparative that I keep these squares filled in.