[Q] Home Button Shortcut to S Voice?

On my Note 4 I could double-tap the home button to bring up S Voice. I can't seem to do that on this device. Does anyone know how to enable that?

from xda-developers http://forum.xda-developers.com/tmobile-galaxy-s6-edge/help/home-button-shortcut-to-s-voice-t3080514?goto=newpost

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