If you want to make the tool window bar visible for a moment, you can press Alt twice and hold it. If the tool window bar is hidden, you can open any tool window by hovering over the corresponding icon in the bottom-left corner: To open a tool window, click its name in the tool window bar: Just like in Eclipse, in IntelliJ IDEA you also have tool windows. The IDE follows your context and brings up the relevant tools automatically. It means that you don't need to switch between different workspace layouts manually to perform different tasks. The second big surprise when you switch to IntelliJ IDEA is that it has no perspectives. The table below compares the terms in Eclipse and IntelliJ IDEA: If you still want to have several unrelated projects opened in one window, as a workaround you can configure them as modules. If you have several unrelated projects, you can open them in separate windows. While in Eclipse you normally have a set of projects that may depend on each other, in IntelliJ IDEA you have a single project that consists of a set of modules. This means that you can work with only one project at a time. The first thing you'll notice when launching IntelliJ IDEA is that it has no workspace concept. If you'd like to import your existing run configurations from Eclipse, consider using this third-party plugin. For more information about importing a project, refer to Import a project from Eclipse. If your project uses a build tool such as Maven or Gradle, we recommend selecting the associated build file pom.xml or adle when importing the project. To do this, click Open on the Welcome Screen or select File | Open in the main menu. You can import either an Eclipse workspace or a single Eclipse project. Import an Eclipse project to IntelliJ IDEA Switching from Eclipse to IntelliJ IDEA, especially if you've been using Eclipse for a long time, requires understanding some fundamental differences between the two IDEs, including their user interfaces, compilation methods, shortcuts, project configuration and other aspects.

Eclipse code formatter settings