Step 2: Effects
tab allows you choose from over 100 special effects for your screen saver. These effects control the way the screen saver transitions from one image to another.
button to see what the highlighted effect will look like. You can also check the
checkbox if you want to see a preview of every effect you select.
Selecting and previewing effects does not change the original files. It is completely safe to explore the different effects to find the one you wish to use.
Step 3: Behavior