How to see Maven console in IntelliJ?

If you configure a Maven Launch-Configuration and execute it the according Maven build output will be displayed in the Run-Tab by default:

(Note: There is a Tab Logs where you can configure additional log relevant settings such as logging to a file).

If you dont like to setup a Run-Configuration for each Maven build (in Intellij as it seems you cant just right click a pom.xml and click run as...) you can call Maven directly from the Tab Terminal

(Note: In my scenario the system variable M2_HOME was set to the maven installation directory and added to the windows PATH variable - after that you can run mvn from any directory - especially from directories containing pom.xml files)