viewing exposure information

I want to view the exposure information for my photos in iPhoto. I have read in answers to other similar questions that you click on the i icon in the lower left and the information appears on the "back" of the photo. Then the answers say you click on the "more information" button and select a triangle to see the extended information. the trouble is, I don't see a "more information" button and I don't see any triangles to select. Can someone help me?

I'm using iPhoto '09 v 8.1.2.