Hey, just recently received a Macbook. The picture screen saver that came with it is great, but yet theres no way to pause or toggle back to a previous picture if I see something I like. To do this with the windows picture screen saver I just used the arrow keys, however this exits the screen saver with the mac. I can't find any descriptions or help for the screen saver, so is there anyway to go back to a previous picture, and if not is there a screen saver program that I can download that will allow me to? Thanks!