Moving Icons
How do I move icons on my new Iphone 8 Ios 12.1
How to move apps and create folders on your iPhone, iPad, or iPod touch - Apple Support provides an explanation.
2 replies
Tap and lightly hold on one icon until they all start to shake, then drag the icons around to where you want them to be.
If you get the 3D touch menu, you are pressing too hard.
More info here: Move and organize apps on iPhone - Apple Support
Moving Icons