Performa 62xx/63xx Series: 800 x 600 Resolution Support

I have a Performa 62xx/63xx series computer with an Apple Multiple Scan 15AV/15" Display. I do not get the option for 800 x 600 in the Monitors control panel. The technical information says this resolution is supported on a Macintosh computer. How can I get this resolution?
Use the steps below to obtain 800 x 600 support:
Published Date: Feb 18, 2012