Using the sliders you will be able to set the number of strings and the tuning of your diagram.
Every function of the editor will take the tuning into account: notes names, degrees names, chords and scales generator and so on.
If you change the tuning of a non-epty document you can choose how you want the existing diagrams to be adapted:
If you select 'preserve notes' the fret-markers will be moved up and down the strings to still play the same notes.
If you select 'preserve fingering' the fret-markers will not be moved, note names and degrees will change to reflect the new tuning.