Rearrange the Order of Your IPhone Favorites to Indicate Who Appears in the 3D Touch Shortcut on Your Phone
3D Touch lets you quickly call four of your favorite contacts from your iPhone’s home screen, but the four that appear there may not be your most common contacts. How-To Geek shows you how to change this.
The four people that appear in the 3D Touch widget are the four people that are at the top of your favorites list, so to change who is there, you just need to edit the order of your favorites. Go to Phone> Favorites, click the Edit button, then click and drag contacts to rearrange them. You can also change the phone number that will be displayed if there are several, or even select “Messages” instead of a phone call.
How to Customize 3D Touch Shortcuts on iPhone | How-To Geek