onscreen rounded black square with a bright white center

[jimac]

How can I get rid of this little rounded black square with a bright white light center that suddenly appeared in the bottom right corner and won't go away from my iPad mini 7 with iPadOS 26.2? I searched everywhere in Settings with no luck. It contains links to Notification Center, Custom, Device, Siri, Control Center and Home, all of which I already know how to access. Ultra annoying and appears in ALL my apps. It's even on my Lock Screen!

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I went to the Apple Support Community at "discussions.apple.com/welcome" and tried to post the above to "Search or ask a question". The question was too long for that so I had to shorten it to the following:

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How can I get rid of this little rounded black square with a white light center that suddenly appeared in the bottom right corner and won't go away from my iPad? Links Notification Center, Custom, Device, Siri, Control Center & Home. VERY annoying!

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THAT resulted in my INSTANTLY being transferred to a new page:

403 Forbidden
_____________________

Apple

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Obviously I'm not the first person to ask that question. I like writing on a nice clean screen and a stupid little distraction like that thing isn't conducive to that. It blocks out whatever is in that corner of the screen and permanently reduces my screen size. I may be able to ignore it after several weeks, but why should I bother? This whatever-it-is doesn't appear on any of my other Apple devices. . . . Yet.

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I'm posting this here on MacRumors in the hope that someone here knows how to disable this thing.

 

[hg.wells]

Have you got assistive touch turned on:

Use AssistiveTouch on iPhone

With AssistiveTouch on iPhone, you can adapt the touchscreen to fit your needs—if certain gestures don’t work for you, replace them with a tap or other gesture, or use a simple sound.

support.apple.com

 

[Davidalan]

To turn off AssistiveTouch, go to Settings > Accessibility > Touch > AssistiveTouch, then toggle the switch off; this removes the floating button from your screen, but you can also use the Accessibility Shortcut (triple-click the side/Home button) to quickly toggle it on or off.

Step-by-step instructions:

1. Open Settings: Tap the Settings app icon on your iPhone or iPad.
   
   
2. Go to Accessibility: Scroll down and tap on Accessibility.
   
   
3. Select Touch: Under the "Physical and Motor" section, tap Touch.
   
   
4. Toggle Off: Tap the AssistiveTouch switch to turn it off (it will turn from green to gray). The floating circle will disappear.
   

Quick Toggle (Accessibility Shortcut):

• • If you have the shortcut set up, you can triple-click the Side button (or Home button on older devices) to quickly hide or show the AssistiveTouch button.

 

[casperes1996]

My first thought was assistive touch too but a screenshot would help figuring this out

 

[HouseLannister]

That white corner is showing you that you can resize the window. Only way to disable is to turn off windowed apps and just use apps full screen (1st option in screenshot below).

Edit: Without seeing it for myself, it is also possible you made the corner effect look worse by turning off transparency or reduce motion. A lot of those accessibility settings make everything kind of wonky in unexpected ways. Set it back to default and see if it is manageable before you turn off multitasking altogether.