iPhone Basics: Enable and Use Caps Lock
While the usage of caps lock is generally reserved for comment trolls and confused old folks, it can be very useful when used responsibly. The iPhone does have a caps lock mode built in, but it’s disabled by default. To enable it, go to Settings > General > Keyboard and turn on “Enable Caps Lock.” Now whenever you need to type in all caps, simply double-tap the shift key to engage caps lock.
Additionally, you can also use this method to enable CHOCK LOCK MODE OK.