The phrase "settings icon" refers to a small picture or symbol on a device or app that you can tap on to access various options and customize the way the device or app works. Full definition
# Quick Settings icon in the upper right corner of your device. (gadgetian.com)
The Quick Settings icon on the top - right corner of the screen is among those you will be tapping the most. (tomsguide.com)
It has almost become a trend - setting icon for digital fashion accessory in the form of smart band for wrist watch with all kinds of incredible features. (indabaa.com)