To really bring your photos off of the page you can add shadows to all of your photos as well! You can have it cast to either of the 4 corners and you can adjust the depth and color of your shadow as well.
There are four shadow options that can be applied. Three of the settings are the depth of the shadow and the fourth is to give the photo a "glow" appearance. Using the dropdown button on the first shadow button you can specify the direction that the shadow will appear. The color of the shadow can also be specified using the color dropdown box.
See the sample for different effects.