IMO its never a good idea to be in neutral at a redlight. always better to be in gear and ready to move if you have to.another great feature is the positive neutral finder. when in first gear, and sitting still the bike cannot be shifted up (or down if you have gp shift) into any other gear but neutral. it cannot go into second. makes it easy to find neutral, especially for newbies.
so make sure you are downshifted to first BEFORE you stop moving, once stopped and in first , one klick up and your green neutral light will come on, and you are free to release the clutch while the bike is idling (waiting at a light for example). light turns green, click down one, and off you go. saves wear on the clutch pack too.