IntelliJ Usage

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Internal

Folding and Expanding Code Blocks

https://www.jetbrains.com/idea/help/folding-and-expanding-code-blocks.html

To collapse all code blocks in the selected area, or in the current file if no area is selected: ⇧ Shift - ⌘ Command - Minus (-)

Display Maven Dependencies

Maven Project Tab -> Right click on the module in question -> Show Dependencies (Popup)

Refactoring

Optimize Imports on the Fly

Preferences -> Editor -> General -> Auto Import -> Optimize imports on the fly

This option activates unused import detection and their automatic removal when the file is edited.

Show Hidden Files and Directories on Mac

Delegate to native Mac functionality when in the Finder window: use Command + Shift + Period.

More details:

Show Hidden Files and Directories on Mac