If you use AssistiveTouch, you’ll pleased to know that in iOS 9 you can customize the top menu and add two more icons to the AssistiveTouch menu.
On the Settings app, go to Settings > General > Accessibility > AssistiveTouch > Customize Top Level Menu… By default, six buttons are shown on the AssistiveTouch menu. Tap on the “+” or “-“ button to add or remove the number of buttons. You can add up to a total of 8 buttons.
Tap on any of the button to change. A menu will pop up for you to select the action to associate with the button. If you’re unhappy with any of the editing you’ve done, tap the Reset… button to get back the factory default settings.