I almost hesitated to post this today for fear that you might think it's a joke, but I assure you that I don't joke. At least not when I'm telling you this.
After my last post where I talked about the basics of the basics, I was thrilled to learn about this handy hint. I noticed that the most troublesome part of teaching iPad basics to a group of people to whom all of the various options and gestures were completely overwhelming, I realized that the most confusing part was remembering which gestures did what, and what combination of taps, clicks, and swipes resulted in what actions.
After a bit of investigating, she learned that this ghostly little dot is born from an accessibility feature called Assistive Touch, which allows users to perform some of those confusing gestures, like double-tapping or multi-finger swiping, without actually double-tapping or multi-finger swiping. All of the most common gestures, all in one place, and launched by the simple touch of a ghost button?! Awesome!
To turn on Assistive Touch: