When working on pages for a book, the binding throws the center off from the left page to the right page. To ensure that your elements are properly centered on each page, create a brightly colored bar that is 11.436″ by .5″ (for a 12 x 12 page) and place it at the top of the page, out of the way. Line it up with the edges of the page excluding the binding.Now, for the fussy detailed scrapbookers like me, all the elements can be centered with the bar. If the page is already created and all the elements need to be moved, group them all together (except for the temporary bar and the background) and then line up the grouped elements with the bar using the alignment tool (Arrange tab).