All the multimode spells have a default mode, usually the first one in the list and when you drag the spell, this default will always be "auto-selected".
You will need to R-click on one of the empty quick slots and use the radial to select "Assign spell" for the class (if you have more than 1 casting class you will need to find the one with Polymorph or ShadConj). Then just navigate to the appropriate spell level, spell and then mode. All multimode spells are handled the same way AFAIK.
Spells on items are handled in a completely different manner. Using one of the listed spells doesn't "use up" any of the others.
Enjoy, mate!
edit: the ninja strikes one in three, MrZork
Modifié par HipMaestro, 14 novembre 2010 - 07:07 .