Enable AssistiveTouch in iOS 13 and iPadOS 13: With iOS 13, Apple has slightly tweaked the location of Accessibility and many of its sub-features.
1. Open the Settings app on your iPhone or iPad.
2. Now, tap on Accessibility and select the Touch option located under the PHYSICAL AND MOTOR section.
3. Next, tap on AssistiveTouch and then turn on the switch to enable it.
Now, a small grey AssistiveTouch button will appear on the screen. You can tap on it to access many options like rotating screen, accessing Notification/Control Center, adjusting volume and more.
Customize Top Level Menu Shown in AssistiveTouch
1. Follow the steps from 1 to 3 above and then tap on the Customize Top-Level Menu option.
2. Now, tap on an icon that you want to change and then choose the preferred option. In the end, make sure to tap on Done at the top right to confirm.
By default, the menu shows six options like Home, Notifications, Device, Control Center, Gestures, and Custom. But you can increase or decrease the number of items you want on the menu.
To increase an item: Tap on the “+” button > tap on the empty box > choose the desired option > tap on Done.