You will see a representaiton an unoccupied
wave function at Gamma.

* 1st run fplo

* then
    xfplo =.xstr

* have a look at all tabs
  - open the WF/gridplot dialog (hotkey w)
  - Component chosen as g (large wave function component)
  - Coloring: self
  - IsoValue set to 0.15
  - Color Model set to "Seismic"
  - Color scalar mapping is modified
  - 2 plane clippers set to hide most of the wave functions
    Note the combinations of "Keep region" and "Combine with previous".
  - 3 active slices with interpolation level lowered to 2, since
    File::interpolation level is at 2, which is already quite high.
    Additional slice-interpolation (default 5) would be quite slow
    and make no difference.
  