Previously available only on 3D Touch-enabled iPhones or with a
two-finger swipe on the iPad’s keyboard, trackpad mode can be
activated in a much easier way in iOS 12: just tap & hold on the
space bar until the keyboard becomes a trackpad. This mode
(seemingly inspired by Gboard and other custom keyboards with a
similar implementation) gives owners of iPhones without 3D Touch a
way to more precisely control the cursor in text fields. Those who
follow Apple rumors claim this feature has been shipped in
preparation for a new iPhone without 3D Touch later this
year; for now, it’s just a nice way to toggle trackpad mode if
you’re using an iPhone 5s, SE, or 6.
One of my favorite features in iOS — once you get in the habit of using it, you can’t go back.