How can I permanently enable line numbers in IntelliJ?

Question

How can I permanently enable line numbers in IntelliJ IDEA?

Answer 1

I add this response for IntelliJ IDEA 2018.2 - Ultimate.

Using menu

IntelliJ Idea > Preferences > Editor > General > Appearance > Show Line Numbers

Using Shortcuts - First way

For Windows : Ctrl+Shift+a
For Mac : Cmd+shift+a

Using Shortcuts - Seconde way

Touch Shift twice

These three methods exist since the last 4 versions of Intellij and I think they remain valid for a long time.