I am kind of annoyed that HTC (or maybe Verizon) has blocked our ability to customize the Quick Settings window. Marshmallow allows it by opening the notification shade all the way and holding the gear icon to add System UI Tuner to the Settings options list, but nothing happens when I try it. So annoyed by this. There are things in there I definitely don't want or need. I'm hoping for either an update to allow us access, or a workaround to customize what's displayed. Anyone know of anything?