Reorder overlapping objects
Objects automatically stack in separate layers as you add them. To change the order of overlapping objectsA single element of your document. An object can be a text box, an imported graphic, a shape, a picture, and so on., you can move the layers forward and backward.
On the View menu, click Publishing Layout.
On the Home tab, under Arrange, click the arrow next to Reorder, and then click Reorder Overlapping Objects.
If Reorder Overlapping Objects is not available
Drag the layer forward or backward to place it where you want it, and then click OK.