Look for the keyboard icon on the right-hand side of your taskbar, bring up the on-screen keyboard, and hold down (or left-click and hold) your cursor over the letter you’d like to accent.

You can add any number of custom keyboard shortcuts, which will make your iPhone automatically insert phrases or symbols when you type a certain phrase.

Using shortcut symbols in a Windows keyboard Windows keyboard symbol shortcuts, or “alt key codes,” require using the alt keys and the number pad.

To type in symbols like a square bracket, you'll need to use one of the navigation buttons to access a secondary keyboard.

As you can see in the GIF, I was able to type "How are you" with three quick swipes across the keyboard, two of which were back and forth on the same row of keys, and iOS 13 got it right.

There are several iPad keyboard shortcuts you can use with your tablet's on-screen keyboard or an external keyboard. You can create any number of "text replacement" shortcuts for your iPad as well ...