First it is searched for the closest Plot-Symbol Areas. From
the found ones the closest above is used. If no one is found
above, the next one below is taken.
The Plot Symbol is placed slightly above of the insert spot
in the Plot Symbol Area, if that position is occupied it is tried
to place it further up.
If that fails it is searched for a place right of the original
calculated position respectively right to the top till the
edge of the screen.
Not until all attempts placing it on the right hand side
fails it is tried to use the left hand side – as fare as to the
edge of the screen.
If no place at all could be found the error message "no more
space for automatic plotting in the display" is displayed and
the Plot-Symbol is placed on the originally calculated spot.