IntelliJ IDEA makes it possible to:

To change indentation of a text fragment, do one of the following
  • On the main menu, choose Edit | Indent Selection / Edit | Unindent Selection.
  • Press Tab / Shift+Tab.
To toggle between tabs and spaces
  • On the main menu, choose Edit | Convert Indents , and then choose To Spaces or To Tabs respectively.

See Also

Getting Started:

Web Resources: