Under the view menu select contour. In the dialog window that appears browse for the plt file just created. Press the import widget. The max and min for the data set now appear directly below the file name. Choose a reasonable value for the max and then for the min.
Press apply and adjust the max and min values accordingly.
More than one orbital can be imported at a time. In order to view more orbitals in the same session browse for and import more plt files. Then turn the display state for the other difference densities off by using the Details widget. A hardcopy can be saved by using the gOpenMol top menu file then hardcopy. The ground state subtracted from excited state three showing mostly d-d transition character.