Multiple behaviours

You follow the same process as in the lesson on "swapping images", marking two images as swapped instead of one: here it is shown that one of them already has a behaviour associated with it (the dimmed view to the North to be replaced by the highlighted one "Image 'NorthInv'"): it has an asterisk; and the next behaviour is being prepared (one of the positions of the visitors, East view "Ev" to be replaced by the next one).