def dsys(self, kcn="", **kwargs):
    """Activates a display coordinate system for geometry listings and plots.

    APDL Command: DSYS

    Parameters
    ----------
    kcn
        Coordinate system reference number.  KCN may be 0,1,2 or any
        previously defined local coordinate system number.

    Notes
    -----
      Boundary condition symbols, vector arrows, and element coordinate
    system triads are not transformed to the display coordinate system. The
    display system orientation (for the default view) is X horizontal to
    the right, Y vertical upward, and Z out of the screen (normal).

    Line directions and area directions (/PSYMB,LDIR and /PSYMB,ADIR) are
    not plotted for DSYS >0.

    When you create ANSYS 3-D annotation, the coordinates are stored to the
    database in the DSYS that was active at the time of creation. Changing
    the DSYS does not change the annotation coordinate data in the
    database.

    This command is valid in any processor.
    """
    command = f"DSYS,{kcn}"
    return self.run(command, **kwargs)