After the sequence is brought into Flash, you may need to center it relative to the page. To do this, follow these steps:
Choose Edit Multiple Frames from the button bar below the Timeline (see (see figure 05:08).
Choose the Modify Onion Markers button (directly to the right of Edit Multiple Frames) and select Onion All from the drop-down menu.
Select Edit > Select All (or use the keyboard shortcut Ctrl-A).
Click and drag the selected artwork to manually center everything to the page (moving it all together). It's not recommended to use Flash's automatic alignment feature in this case. Using that feature may throw off the object from the center of its rotation and ruin the illusion of 3D motion.