Code reference information
Definitions
In RubyMine, you can see where and how symbols, such as tags, classes, fields, methods, or functions are defined in your project. For this purpose, the IDE features the Quick Definition popup.
To view definition of a symbol, select it in the editor and press Ctrl+Shift+I (or click ).
Alternatively, with the Ctrl key pressed, hover the cursor over any symbol. RubyMine displays the symbol as a link and shows its definition in a tooltip. Click this link to jump to the definition of the symbol.
Click the 
icon in the top-right corner to open the definition in the Find tool window. To open the source code of the definition for editing and close the popup, click the 
icon F4. To open the definition without closing the popup, click the 
Ctrl+Enter.
Parameter info
The Parameter Info popup shows the names of parameters in method and function calls. RubyMine automatically shows a popup with all available method signatures within 1 second (1000 milliseconds) after you type an opening bracket in the editor, or select a method from the suggestions list.
You can explicitly invoke the popup if it has closed or if your IDE is configured not to show the popup automatically. To do so, press Ctrl+P (or click ).
Show full method or function signatures
By default, the parameter info popup shows simple signatures. You can configure the IDE to show full signatures that include method names and returned types.
In the Settings/Preferences dialog (Ctrl+Alt+S), go to , and select the Show full method signatures checkbox.
Configure the parameter info popup
In the Show the parameter info popup in ... milliseconds field, specify the time in milliseconds after which the popup should appear.
If you don't want the popup to appear automatically, clear the Show the parameter info popup in ... milliseconds checkbox.
Parameter hints
Parameter hints are displayed in the editor inline with your code to increase its readability. They show the names of method parameters for passed values that are literals or nulls.
The hints are enabled by default. If you don't want to see them for specific methods, you can configure the list with exceptions.
Configure the parameter hints exception list
By default, the exception list contains a number of pre-defined methods. You can remove a method from the list to see the hints for it, or add new methods to hide their hints in the editor.
Next to the Show parameter name hints option, click Configure.
Select the necessary language from the Language list.
Add methods for which you don't want to see the hints to the Blacklist section.
You can also enable additional options for the hints at the bottom of the dialog. Then apply the changes and close the dialog.
Quick documentation
You can get quick information for any symbol or method signature by means of the Quick Documentation popup. Note that the symbol must be supplied with documentation comments created in accordance with YARD or RDoc markup, or with documentation from an SDK.
To view documentation for a symbol at caret, press Ctrl+Q (or click ).
You can press Ctrl+Q again to switch between the popup and the toolbar.
Click the 
icon to change the font size, display the quick documentation toolbar, or go to the source code.
Automatically show quick documentation
Type info
In RubyMine, you can identify the type of an expression in the following way:
Place the caret at the necessary code element and press Ctrl+Shift+P (or select from the main menu).
External documentation
External documentation opens the necessary information in a web browser, so that you can navigate to related symbols, and keep the information for further reference at the same time.
View external documentation
To view documentation for a symbol at the current caret position in a web browser, press Shift+F1 (or click ).
Productivity tips
- Copy tooltip text to the clipboard
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To copy tooltip text to the clipboard, hold Alt (on Linux, hold Ctrl+Alt) and click the tooltip.
- View context information
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If the current method or class declaration is not visible, you can view it in the tooltip by pressing Alt+Q.