Get rid of the middle grey line in the workspace

Question

How can I remove that grey line on the code workspace .. Image:

• Look at that vertical grey line at the right side ..

Answer 1

As of PHPStorm and WebStorm 2018.3 IDE, The check "Show right margin" has been replaced with "Show hard wrap guide". In Settings → Editor → General → Appearance

Also "Right Margin" value has replaced with "Hard wrap" under Settings → Editor → Code Style.

Shortcut key to Settings: CTRL+ALT+S