Display Adjustment Utility or Gray Bar test pattern, where is it?

I am trying to adjust the focus and screen voltage on an older CRT iMac. The Service manual references a "Display Adjustment Utility" in OS 9. I am not an OS9 person so I don't know how to find it. I tried help in OS9 but could not find it. What I'm looking for is a gray bar test pattern to adjust the screen voltage (make the display lighter).
Thanks,
Alfredo

Just an update... I found the utility at the following site:
http://home.earthlink.net/~strahm_s/manuals.html
Alfredo

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