Answer:
I didn't know this, but my son whos an Iphone expert just told me how
Explanation:
1. iPhone has updated to iOS 14.
2. head to Settings > Accessibility
3. Tap Touch
4. Scroll to the bottom of the page, and choose Back Tap
5. Tap Double Tap or Triple Tap to Pick an action
6. To set up Double Tap to take a screenshot, simply tap Screenshot
7. Now when you double tap the back of your iPhone, your smartphone will take a screenshot!
