Previous: markervariablename- Up: ../slides.html Next: nomask-number-

MASK xmin xmax ymin ymax zmin zmax

 Mask the  rectangular  region defined  by  the extents  xmin..xmax  and
 ymin..ymax (measured  in  the  current  world  coordinate  units)  from
 further plotting.   Although  rarely  required, it  is  permissible  to
 specify a depth range  zmin..zmax as well; the  defaults for these  two
 are both zero.  This command might be useful, for example, in  ensuring
 that a legend box placed  on the window is not  overdrawn by part of  a
 plot later  brought in  with a  PLOTFILE command.   Masked regions  are
 saved on a stack and may be  removed by the NOMASK command if it  later
 becomes necessary to plot in them.  The masked region stack is  cleared
 when a new plot is started.