How to have the formatter wrap code with IntelliJ?

Question

I\'m not able to format my code in IntelliJ.

I can see the margin line (by default at 120 columns) but it seems that the activation from the menu:

Answer 1

Enabling "Ensure right margin is not exceeded" doesn't work for me in Intellij IDEA 2018.2. I have found the workaround, we need to change every elements below from "Do not wrap" to "Wrap if long".

After that, we can preview what kind of wrap type will be changed by looking into right panel. If we are satisfied, Click "OK" or "Apply" to apply the changes. Finally we need a mannual format by using CTRL+ ALT+ L in Windows and Command+ Shift+ L in MacOS.