Pass the arrow cursor over the ‘Pan’ button, click once
with the left-hand mouse button, now when the cursor is moved over the map it
will be diamond shaped.
By depressing the left-hand mouse button and dragging the cursor, it is possible
to pull the map around the screen as you would a paper map on the desk. The
previously unseen areas of the map (the white areas) will be redrawn when the
mouse button is released.