Unity Tip: Hold Alt to Mass Collapse/Expand GUI Hierarchies

2014-03-29 18_51_31-Unity - On Rails Shooter.unity - Camera Path 3 - PC, Mac & Linux Standalone

You have a complex scene with many nested GameObjects and then you accidentally click on that small pebble in your scene making your hierarchy explode to reveal that pebble. Fear not! You can alt click the top level parent arrow to collapse every collapsible child GameObject and return your hierarchy to normality.
Phew!
It also works the other way around, allowing you to expand every nested GameObject instead of only the current selected one.

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