Software Development

Activate Line Numbers in IntelliJ IDEA

IntelliJ is a popular integrated development environment (IDE) tool utilized for code development. Renowned for its intelligent code assistance, it significantly boosts productivity and expedites development tasks. Moreover, it employs a structured approach to project directory organization. Widely adopted across diverse programming languages such as Python, Java, Kotlin, Lua, and more, IntelliJ proves to be a versatile solution for developers. Let us delve into understanding how to activate line numbers in IntelliJ IDEA.

1. How to Permanently Enable Line Numbers in IntelliJ IDEA

IntelliJ IDEA is a popular integrated development environment (IDE) used by many developers for Java, Kotlin, and other programming languages. Line numbers can be an essential tool for navigating code, especially when debugging or collaborating with others. Here’s how you can permanently enable line numbers in IntelliJ IDEA:

1.1 Enable Line Numbers Globally

To enable line numbers globally in IntelliJ IDEA, follow these steps:

  • Open IntelliJ IDEA.
  • Go to File > Settings (or press Ctrl+Alt+S).
  • In the Settings dialog, expand the Editor section.
  • Click on General.
  • Check the box labeled Show line numbers.
  • Click OK to apply the changes.

1.2 Enable Line Numbers per File

If you prefer to enable line numbers on a per-file basis rather than globally, you can do so by following these steps:

  • Open the file for which you want to enable line numbers.
  • Go to View > Show Line Numbers.

1.3 Using the Shortcut Key

You can also toggle line numbers using a shortcut key combination. By default, the shortcut key for toggling line numbers is Ctrl+Shift+F10. Pressing this combination will toggle the visibility of line numbers in the current editor window.

2. Importance of Enabling Line Numbers

In addition to the steps outlined above, it’s worth noting that enabling line numbers in IntelliJ IDEA can significantly improve code readability and comprehension, especially in larger projects or when collaborating with team members. By providing a clear reference point for each line of code, developers can easily pinpoint errors, navigate through complex codebases, and communicate more effectively with colleagues during code reviews or pair programming sessions.

Furthermore, the flexibility to enable line numbers either globally or on a per-file basis, along with the convenient shortcut key for toggling their visibility, underscores IntelliJ IDEA’s commitment to user-friendly customization and streamlined workflow.

3. Conclusion

In conclusion, IntelliJ IDEA stands out as a highly favored integrated development environment (IDE), esteemed for its robust features and intuitive interface. With its intelligent code assistance, developers experience heightened productivity and efficiency throughout the coding process. Its structured project directory organization simplifies navigation and management, fostering a seamless development experience. Moreover, IntelliJ’s versatility extends across a multitude of programming languages, including Python, Java, Kotlin, Lua, and beyond, making it a go-to choice for developers across diverse domains. As a comprehensive tool, IntelliJ IDEA not only streamlines code development but also cultivates a conducive environment for innovation and collaboration within the programming community.


An experience full-stack engineer well versed with Core Java, Spring/Springboot, MVC, Security, AOP, Frontend (Angular & React), and cloud technologies (such as AWS, GCP, Jenkins, Docker, K8).
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