Redirecting a blend by editing its spine

- [Voiceover] All right, now one of the interesting things…about object blends is that when the two extreme shapes…are far apart from each other, as they are in this case,…we have this thing called the spine in between,…and to see that spine, I'll go ahead and select it…using the white arrow tool, that's very important,…by marqueeing through the central portion…of the intervals like so,…at which point you will see this path outline…between the center of the square…and the center of the circle,…and that is the spine, incidentally,…and what it amounts to is the path along…which the blend progresses,…and now notice if I go up to the Object menu,…choose Blend and then choose Reverse Spine,…that'll reverse the direction of that path…and it'll also reverse the direction of the entire blend…as you can see here,…and by the same token,…if I go ahead and grab this anchor point…at the end of the path outline,…this is the end of the spine,…and this is the beginning, incidentally,…if I go ahead and drag this anchor point down…