------- GRID (Function Key) -------


--  This function key when pressed will display a grid of dots 
    on top of your drawing.

--  Pressing the function key again will remove the grid.

    NOTE  Whether or not GRID is left on or not when you save your drawing.
          the grid will not be saved as part of your drawing.
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    NOTE  GRID may be useful as a simple method of on screen measurement
          and comparison.
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