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  1. Push the cog next to your name in the lower left hand corner
  2. Click the voice tab
  3. Change "Input Mode" to "Push to Talk"
  4. Click in the blank box to the right of "Push to Talk" to enable key recording so you can set your button.
  5. Press your button or buttons. They should show up in the box. Click out of the box when you are done. Then your all set.