Draw all Button to draw all MO as the set of models. Compare Switch between displaying MO from primary grid file and displaying difference between two grids. This checkbox is visible only if secondary grid has been loaded. IsoValue Textfield to display and change current value for displayed isosurface. The increment value can be changed using configuration panel.
Middle button restores last isovalue, typed in the IsoValue textbox.
The number of frames can be changed in configuration panel. Colors Select colors for positive and negative isosurface values. Atoms Select type of atoms. Load Grid Open panel to load grid file. Using this panel you can also read secondary grid file to display difference between two densities or MOs.