NOTE: [F1] [ORDER] key 
Press [F1] [ORDER] to confirm order of
selected points after you finished the
selection. If you finish point selection of a
polygon, press [F1] [ACCEPT] to 
calculate. The result of calculation is
displayed as follows.
Press [ENT] or [ESC] to return to POINT SELECTION FROM THE LIST screen. You 
change a selection, and you can calculate it again.
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