most of the data models I work with don't fit onto one screen. Zooming out far enough usually makes table names and columns illegible. However, after I move a table at the bottom right end of the data model, the viewer automatically repositions itself to the top left of the model. This makes it really annoying and time consuming to move tables in order to arrange the model (or whichever part thereof is visible on the screen at the time) neatly.
