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You use the top edge to get to Ubuntu Touch's settings.
To access your smartphone's indicators, you swipe down from the top edge. This includes, from left to right on the top bar, GPS, Wi-Fi/cellular data settings, mail, the battery, volume, and time and date. Once you swipe, you'll be able to access these functions from icons that appear on the main display.
To hop out of Ubuntu Touch's settings, swipe upward.
Once done with settings, you swipe upwards and the settings disappear and the indicators reappear into the top bar.
To get to the Ubuntu Launcher, you swipe in from the left edge.
You swipe from the left edge to access the main applications. All this "swiping" works remarkably well.