How to make the most of your iPhone's accessibility features - The Verge

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Dive down into the menus to tune your iPhone to work for you
Apple offers a lot of accessibility options for the iPhone. Having difficulty seeing things on your iPhone? Make them bigger. You can also make them brighter (or less bright, or even differently colored if you have a form of colorblindness). You can even make them less migraine-inducing, or have Siri read and describe everything on your screen to you.
If you need help when it comes to hearing sounds and voices on your iPhone, you can adjust audio dynamics, read transcriptions, or have your iPhone flash a bright light when you get a call or a notification.
Maybe you prefer a different way to control your iPhone. You can customize touch gestures — or even use the AssistiveTouch feature to use single taps where more complicated touch gestures might otherwise be needed. You can integrate peripherals to avoid having to touch your phone much at all. You can even use voice commands.
Or maybe you need another accessibility solution. This article will at least help you get started off in the right direction.
The iOS accessibility menu presents four categories of accessibility options, which you can find by going to Settings > Accessibility.
This is where you can access and configure each accessibility feature. Some accessibility settings are simple and straightforward. Others are more complex, presenting lots of options and additional features.
To get you started, here’s an introductory overview of each iOS accessibility setting.
By default, certain tasks on the iPhone require awkward or sophisticated gestures — even simple tapping and dragging have to be done with a certain degree of precision. When you turn AssistiveTouch on, a transparent button will appear and remain hovering on the screen (which you can tap and drag to relocate).  
To turn on AssistiveTouch:
Tapping the button once (by default) will open the AssistiveTouch menu, which makes certain features — otherwise managed by the side button or volume button, or by swiping motions — accessible with a single tap on the screen. You can customize from the AssistiveTouch settings screen by selecting Customize Top Level Menu.
On the AssistiveTouch page, you can find additional options to connect and set up a mouse or other peripheral pointer device to your iPhone and use AssistiveTouch to control it.

As you poke around, you’ll notice that many of these accessibility features have a lot of sub-features and sub-sub-features to tinker with. Whatever your accessibility needs, there’s a not-bad chance that the iPhone offers a solution.

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