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SUBROUTINE SETVP2 (XMINP,XMAXP,YMINP,YMAXP)
C$ (Set Viewport 2-D)
C$ Establish a two-dimensional viewport lying entirely within
C$ the unit square. The ranges of the normalized device
C$ coordinates in each dimension are (XMINP,XMAXP) and
C$ (YMINP,YMAXP) respectively. Each parameter must lie in the
C$ interval 0.0..1.0, or in smaller ranges defined by the size
C$ of normalized device coordinate space if it has been reset
C$ by a call to SETDS2 or SETDS3.
C$ (02-FEB-82)