Arrange the Images
Microsoft
Office--Word and PowerPoint, too--allow you to Arrange the images on
different layers. You can place a picture in front or behind the
other images or behind the Text.
Try
This: Bring to Front
Go to the
Baseball slide.
Insert two
pictures.
Move one
picture so that it overlaps the other, like the screen shot on this
page.
Go to
Picture Tools ->Format.
Click on
Bring to Front.

Memo to self: Bring to Front
places the image on the top layer. If you have three or more images
you can use Bring Forward to move a picture up one layer.