Stack photo boxes in a specific order
As you arrange photo boxes on a book page, perhaps overlapping them to create a certain look, you may want to change their stacking order. For example, you might want to place three photos on top of one another in a specific order. To change the stacking order of photo boxes, you select a photo box and then click the Bring Forward or Send Backward button.
Change the order of a stack of photo boxes
In the Book Layout Editor, click the Edit Layout button, if it’s not already selected.
Select the photo box whose stacking order you want to change.
Do one of the following:
Click the Bring Forward or Send Backward button.
Choose Arrange from the Book Action pop-up menu , then choose an option from the submenu.