You can use the Selection pane to see a list of all the objects on a page, rearrange their layer order, and toggle their visibility.
Select an object.
Expand the Editing group in the Home tab.
Click the Select button.
Select Selection Pane.
The Selection pane appears at the right, and you can see how the graphics are layered.
Click the Up or Down arrow to move the selected object.
The selected object moves up or down in the layer order.
The Selection pane can also be used to toggle the visibility of objects by clicking the visibility icon to the right of the selected object. You can toggle the visibility of all the page’s objects by clicking Hide All or reveal them all by clicking Show All.