 XYMWL                                                      Menu: (MWALS) MWUTL
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 Creates two consecutive orthogonal multi-layer walls at right angles.

         1.   (POINT) first wall point
         2. * (POINT) next wall point

 Description:
 This command connects two points on the xy plane by two consecutive
 multi-layer walls, the first wall being parallel to the x axis and the second
 parallel to the y axis. The first wall spans from the first point to
 an interim point with the y value of the first point and the x value of the
 second point. The second wall starts at the interim point and spans to the
 second point.
 Pick two points. The walls are created. You are prompted to pick additional
 points, each adding two more orthogonal segments to the wall sequence, until
 you select a new command.

         Example: \xymwl 0 0 0 4 4 0

 Result: Two multi-layer walls are created: one with its axis from 0 0 0 to
 4 0 0; and the second from 4 0 0 to 4 4 0.
