Go to Settings > Developer options flip the SystemUI Tuner toggle to the on position. Go back to the main Settings screen, then tap SystemUI Tuner. If you want all background tasks to continue for a given app, though, you can turn “doze” mode off on a per-app basis. Go to Settings > Battery, then go to the Options menu (the three dots in the upper right) ta Ignore optimizations. Tap the downward-pointing arrow, then tap l apps. Tap an app’s name, then toggle the Ignore optimizations slider to the on position. The quick settings drawer’s new Do Not Disturb item has a few tricks worth checking out. th it, you can also now toggle Do Not Distrub on or off, set a duration, specify which notifications you want to see. By default, this view shows only third-party apps with access to your information. To show bundled apps services, tap the Options button (the three dots in the upper right), then tap Show system. Instead of the toolbar that appeared at the top of the screen, as was the case in prior version of Android, text editing comms now appear in a floating toolbar directly above the text you’ve selected. Tap the Options button (the three dots) to view more comms.