Internal

Folding and Expanding Code Blocks

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

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

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.

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