Select SCM → Spectra
ADFspectra will start and show the calculated excitation spectrum.
When moving the mouse above a peak a pop-up will give you more information about that peak:
Move the mouse above the largest peak and hold it there
The composition of the excitation in terms of orbital transitions is listed in the pop-up. If you move the mouse inside the pop-up and click on a line the corresponding orbitals will be shown using ADFview:
Move the mouse inside the pop-up and click on a line with a contribution
