To perform the action assigned to the Action button, press and hold the Action button. For many functions, the Action button can be used to turn a setting on or off. For example, if the selected action is Silent Mode, you can press and hold the Action button to put iPhone in Silent mode.

Using the iPhone's "AssitiveTouch" feature, we can create a virtual floating button that you can move around the screen. First, open the "Settings" app. Next, go to the "Accessibility" settings and select "Touch." Go to "Assistive Touch" and toggle it on at the top of the screen. A floating button will appear on the screen.