def gfile(self, size="", **kwargs):
    """Specifies the pixel resolution on Z-buffered graphics files.

    APDL Command: /GFILE

    Parameters
    ----------
    size
        Pixel resolution.  Defaults to a pixel resolution of 800.  Valid
        values are from 256 to 2400.

    Notes
    -----
    Defines the pixel resolution on subsequently written graphics files
    (Jobname.GRPH) for software Z-buffered displays [/TYPE].  Lowering the
    pixel resolution produces a "fuzzier" image; increasing the resolution
    produces a "sharper" image but takes a little longer.

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