The Aerial view allows you to tell, at a glance, exactly
where your current view window is located in reference to your data. The
red rectangle represents your current view (what appears in the workspace),
and the black rectangle represents the database extents. You can close
the Aerial bar by clicking on the X in the upper-right corner. You can
expand the size of the bar to the entire height of the workspace by clicking
the up-arrow; then reduce its size by clicking the down-arrow. While it
is docked in the VisualCAM window, you can resize the height and width
of the bar by moving your cursor to one of its outer edges. When the cursor
changes to , click and hold the left mouse button while you
drag the edge to the desired size.