“I don't see a scroll wheel. What part performs this function?”

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• The scroll wheel function is handled by sliding your finger up or down on either side of the collar surrounding the ball. In the photo the collar looks silverish on the one i have its black and slippery. occasionally it requires you to slid your fingers on both sides at the same time to make it work.

  Answered by Rick 6 years ago

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• the raised section currounding the ball is like a touch pad and if youu slide your finger on it, it works as a scroll wheel.

  Answered by Rick 6 years ago

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• It is like magic! The ring around the trackball is touch sensitive. You do not have to scroll the ring clock or counter clockwise just swipe your finger around the ring.

  Answered by ROCKnRLR 6 years ago

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