I'm using iMovie 08.

I want to make a slideshow from pictures I have in iPhoto. When I add photos to the timeline, is there some way to mark the photos so that I know I have already used them?

There are lots and lots of pictures in this slideshow and I will be grabbing pictures here and there from iPhoto and adding them as appropriate to the music I choose. I would prefer if there was some way to know that the photos have already been used.

The only way I've done this in the past is to remove them from iPhoto as I add them to the timeline.

Thanks for any helpful hints or ideas.