[GREG2\]RGMAP /KEEP File_Name [Blank]
Will keep a formatted copy of the coordinates of the contour points in
the specified file. This file can later be used as an input file for
COLUMN. X coordinates are in column 1 and Y coordinates in column 2. The
Blank value is written as a separator value for later CONNECT/BLANKING
Blank. Blank defaults to the SET BLANKING value if it exists, else Blank
is mandatory.