How to change line width in IntelliJ (from 120 character)

Question

I was wondering how I can change the line length in IntelliJ.

Since I use a pretty high resolution, I get that line that shows 120 characters straight through the middl

Answer 1

IntelliJ IDEA 2018

File > Settings... > Editor > Code Style > Hard wrap at

IntelliJ IDEA 2016 & 2017

File > Settings... > Editor > Code Style > Right margin (columns):