On the left side of the File Browser window I used to have a column which was divided into 3 parts: top part = file/folder navigation-----middle= photo preview window-----bottom= file information

Now I only have the top part and don't know how to view the lower 2 parts.
Please help---I'm going crazy!!!! TIA
PSE2
Mac OS 10.2.8
Powerbook 667mhz
1 GB RAM