%N grlinr %F $MIR/src/grlinr.f
%D Draw a line (relative, world coordinates)
%B
      SUBROUTINE GRLINR (DX,DY)

 GRPCKG: draw a line from the current position by a specified
 relative displacement.

 Arguments:

 DX, DY (real, input): the displacement in world coordinates: the pen
       position is incremented by DX in x and DY in y.
