问题
How do I permanently turn on line numbers in IntelliJ IDEA 14? This post is outdated: how-can-i-permanently-have-line-numbers-in-intellij
回答1:
Permanently (Ubuntu):
File > Settings > Editor > General > Appearance > Show Line Numbers
For just the current editor: View > Active Editor > Show Line Numbers
回答2:
You can do it even faster, using the Search Everywhere tool (press Shift twice): type "Show Line Numbers" (or even "line") and the top hit is the switch for permanent line numbers.
There are 2 switches for line numbers, one that has a On/Off switch and works globally, and one without the switch - for the current file. And one more for the Active Editor (current file).
回答3:
Go to Settings/Editor/General/Appearance and enable Show line numbers to permanently show line numbers for all editors.
The solution with View > Active Editor > Show Line Numbers seems to work only for the active editor (when you close the current tab or open a new file you have to enable it again).
回答4:
Go to Preferences > Editor > Appearance, and select the Show line numbers check box.
It will turn on the line numbers permanently.
回答5:
Just right click and enable Lines in Windows. For more info check this link.
回答6:
IntelliJ IDEA 15.0.3
File > Settings > Editor > General > Appearance > Show Line Numbers
回答7:
In Android Studio 1.3.2 (a variety of IntelliJ Idea) you can find the "Show line numbers" checkbox under:
Android Studio > Preferences > Editor > General > Appearance
Or, if you type "line numbers" into the main search box you'll be presented with a switch you can set right there.
来源：https://stackoverflow.com/questions/27032622/how-do-i-turn-on-line-numbers-permanently-in-intellij-14