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

It seems like Jetbrains made some renaming and moved settings around so the accepted answer is no longer 100% valid anymore.

Intellij 2018.3:

hard wrap - idea will automatically wrap the line as you type, this is not what the OP was asking for

visual guide - just a vertical line indicating a characters limit, default is 120

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If you just want to change the visual guide from the default 120 to lets say 80 in my example:

Also you can change the color or the visual guide by clicking on the Foreground:

Lastly, you can also set the visual guide for all file types (unless specified) here: