This feature works on default iOS apps as well as third-party apps, wherein you are supposed to use a keyboard. Without further ado, Let’s jump to the steps. Why should you always show UPPERCASE Keys on iOS Devices? The purpose of this hack is to keep the keys more prominent so that people with poor eyesight can view keys properly while typing. When you turn off ‘Show Lowercase Keys,’ letters on the keyboard will turn to uppercase even if you are not using Shift or Caps Lock options. In default selection (Show Lowercase Keys), you need to tap on Shift or Caps Lock to enable uppercase keys.
How to Switch Keyboard from Lowercase to UPPERCASE on iPhone/iPad
Step #1. Launch Settings app on your iPhone/iPad → Tap on General. Step #2. Now tap on Accessibility. Step #3. Next, scroll down and tap on Keyboard (this option is available under 3D Touch feature). Step #4. Toggle Show Lowercase Keys OFF. That’s it! You have converted the keyboard from lowercase to uppercase in appearance only. Signing off… With larger letters, users can quickly select keys to type long messages while using apps like Mail and WhatsApp. Take a peek at these posts as well:
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Would you like to show UPPERCASE keys on your iPhone or iPad?