How to render a part of Javadoc of a source file in IntelliJ on Mac

To render a part of Javadoc of source file in IntelliJ on Mac,

go to any line having Javadoc that you want to render

and use the following shortcut:

control + J

Reference:
http://stackoverflow.com/questions/11053144/how-to-see-javadoc-in-intellij-idea