Viewing Inline Documentation
Quick Documentation Lookup helps you get quick information for any symbol or just method signature information, provided that this symbol has been supplied with documentation comments in the applicable format.
IntelliJ IDEA recognizes inline documentation created in accordance with Javadoc markup.
In this case, such documentation is properly rendered in the Quick Documentation Lookup pop-up window:
For markup languages, IntelliJ IDEA retrieves reference from the language specification according to the Document Type setting.
The URLs and e-mail addresses specified in the documentation comments for methods are also properly rendered. Clicking a hyperlink opens the corresponding URL in an external browser; clicking an e-mail address opens the default mail client.
When you explicitly invoke code completion, then quick documentation for an entry selected in the suggestion list can be displayed automatically. The behavior of quick documentation lookup is configured in the Show documentation popup in field on the Code Completion page of the Settings/Preferences dialog.
View documentation for a symbol at caret
On the main menu, choose.
Provided that the checkbox Show quick doc on mouse move in the editor settings is selected, just move your mouse pointer over the desired symbol.