Razer Atrox Manual page 32

4. The turbo button will be lit if assigned to an action button or unlit if skipped.
5. Once a turbo button has been assigned, the next turbo button will blink.
6. Repeat step 3 until all the turbo buttons have been assigned or skipped.
7. Once done, the turbo buttons will blink twice and you can continue gaming.
32 | For gamers by gamers™