Code Folding
File | Settings | Editor | General | Code Folding for Windows and Linux
RubyMine | Settings | Editor | General | Code Folding for macOS
CtrlAlt0S 
Use this page to specify the default code folding settings. For shortcuts on how to expand or collapse code elements, refer to the code folding section.
Item | Description |
|---|---|
Show code folding outline | Select this checkbox if you want the code folding toggles to be shown in the editor. Clear the checkbox to hide the toggles. |
Show code folding arrows in the editor gutter (the new UI) | Select this checkbox if you want the code folding toggles to be shown in the editor's gutter. Clear the checkbox to hide the toggles. Selecting the Show bottom arrows option, will display the folding bottom arrows in the gutter as well. |
Fold by default | Select the code fragments which should be folded by default, that is, when a file is first opened in the editor. |
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