System UI Tuner

So I have Marshmallow loaded/rooted and unlocked bootloader with TWRP 3 installed. I've seen a lot of information out there about enabling System UI Tuner under 6.0 but have not been able to actually get it enabled. One tip says hold the gear icon after swiping down from the top for 5 or 10 seconds, another says it will be in Developer Options but I don't see it.

Am I just missing something or with the version of 6.0 that I'm running is it just not there?

from xda-developers http://ift.tt/2aJFIJY
via IFTTT