Change Assistive Access settings on iPad
After you set up Assistive Access on iPad, you can change settings for apps that you added and customize other system settings as needed. You change most Assistive Access settings in the Settings app 
when Assistive Access isn’t active, although some settings can be changed in Assistive Access.
Change Assistive Access settings in the Settings app
In the Settings app, you can add apps to Assistive Access and customize them, choose a screen layout, enable or disable the iPad buttons that control volume, show or hide additional information (such as the time or battery level), and more.
To adjust these settings, exit Assistive Access if it’s active, then go to Settings > Accessibility > Assistive Access. Below are just three of the settings you can adjust.
 Wallpaper Choose a background image for the Lock Screen. |  Notifications Turn on Show Notification Badges so that an icon appears and a sound plays when apps have new notifications. |  Siri Allow the use of Siri in Assistive Access. |
Change settings while Assistive Access is active
Some system settings can be adjusted without needing to exit Assistive Access. For example, you can turn Airplane Mode on or off, or turn iPad off.
To adjust these settings while Assistive Access is active, triple-click the Home button (on an iPad with a Home button) or the top button (on other iPad models), tap Settings, then enter the Assistive Access passcode. Below are just three of the settings you can adjust.
 Appearance Turn on Dark Mode or adjust screen brightness. |  Volume You can adjust the volume here, even if you disabled the iPad volume buttons. |  Text size To make text easier to read, increase the text size. |
You can also reset Assistive Access if you want to start over and set it up again.