How do I adjust the video display on my G3 iMac

I think my machine has the 300MHZ processor. It runs fine, but there is a fairly large amount of "black space" that is not being used on the monitor. If it was any other analog monitor, I could change the settings to make the screen expand. But on this iMac, it doesn't appear to have any knows to twist and turn to make adjustments. Am I looking in the wrong place?
Thanks!

If your machine is working properly, you can adjust screen real estate by going to - System Preferences - Displays - and clicking the "Geometry" tab.
If the controls there don't help, you likely have a hardware problem.
David

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How do I adjust the video display on my G3 iMac

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