How to show(unfold) the hidden(folded) code in Intellij-IDEA with keyboard shortcut?

Question

How can I show(unfold) the hidden(folded) code in IntelliJ IDEA, as shown in the picture below, just using keyboard without touching the mouse?

Answer 1

In IntelliJ IDEA you can use to following shortcuts to fold/unfold code blocks:

• To fold and unfold CURRENT selected block of code:
  • CTRL+- and CTRL++ on Windows;
  • ⌘ CMD+- and ⌘ CMD++ on Mac;
• To fold and unfold ALL blocks of code:
  • CTRL+⇧ SHIFT+- and CTRL+⇧ SHIFT++ on Windows
  • ⌘ CMD+⇧ SHIFT+- and ⌘ CMD+⇧ SHIFT++ on Mac.

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By the way, in Settings → Editor → General → Code Folding you can specify the default folding behavior for a various situations (e.g., imports, one-line methods, inner classes, @SuppressWarnings annotations, array literals, generic constructors and many others):

And even after that your folding/unfolding hotkeys listed above will work as well.

Answer 2

To be sure which shortcuts are available go to settings > Keymap

then go to

Main Menu > Code > Folding

Expand default on mac : cmd+ default on win : ctrl + numpad + Collapse default on mac : cmd- default on mac : cmd- default on win : ctrl + numpad -