This page allows you to see and change the partial selections for all the notes up to B6.  Tap on a partial that you would like to change and then tap the "+" or "-" button to raise or lower the partial.  Tap the "dup" button to duplicate the partial selection for the next higher note. (This is a quick way to change many notes at once.)  Tap on "store as default" if you would like the current selection to be stored as the default for all tunings that are created with the "New tuning" selection.  Otherwise the partial selection will apply only the currently-loaded tuning file.