When doing detail work while zoomed in on one end of an object such as a
line, if the other end of the line extends past the extents of the screen,
the view automatically zooms to the center of the line when the edit is
performed.  I then have to pan back to the end I was working on each time.  
Also, when zoomed in on a slide, after deleting an object, the view
automatically zooms to the center of the slide.  Is there a way to turn off
this auto-zoom?