Shake to undo typing, tap for options:
Whether you’re typing an email or messaging someone, there’s no need to keep hitting the backspace button to delete erroneous text.
Apple actually has a hidden feature that lets you shake to undo text. If not enabled, fire up Settings > Accessibility > Touch > Shake to Undo and turn it on.
Now whenever you want to undo what you’ve just typed in, shake the phone and a pop-up asks you if you want to Undo Typing.
Alternately, you can just tap three fingers on the screen to pull up a box allowing you to “Undo” and “Redo” the typing.
Disable character previews in iPhone:
You know that annoying bubble which pops up to show the alphabet, number or special character you’re hitting whenever you type on the keyboard?
It’s very distracting and is the default setting in iOS.
You can disable character previews on the iPhone via Settings > General > Keyboard > Character Preview.
Pinned conversations:
The iPhone has one more trick up its sleeve for perennial texters — pinned conversations.
Open the Messages app, long press on a conversation and up pops the option to pin it to the top of the list as a bubble.
You no longer have to keep scrolling to find people you text too frequently. This works for group chats too.
Pinned conversations float right to the top of your Messages screen like bubbles.
You can unpin conversations pinned to the top by long-pressing the bubble in question and tapping Unpin.