This page allows you to adjust the order of the images and the nature of the transition, as well as remove images that you don't want to be in your tribute.
To make changes to an image, you need to select it by clicking its thumbnail. Doing so will turn the border green, showing that the image is selected.

Using the control buttons, you can rotate your images left or right in 90 degree increments, change the display order of an image, or delete the image altogether.

You can also adjust the transition, or how the image moves in the tribute player. The gray frame labeled "Player Window" represents the portion of the image that the tribute player will focus on near the end of the image's transition. The image will automatically move from a horizontally- and vertically-centered position to the focal point of your choosing.
To change the focal point, just click the gray window and drag it around inside the image.

After you have made all of the desired adjustments to each image, save your changes by clicking the Continue button near the bottom of the screen.