Can some explain the "hz" parameter?

BlitzMax Forums/BlitzMax Beginners Area/Can some explain the "hz" parameter?

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I'm kind of lost on the hz parameter in the graphics command. I thought if it was 0 it would default to whatever the card is set at, but I "think" BMax is forcing it into 60hz mode if = 0. Can someone explain in detail what this parameter does? Thanks!