FastFlatten for Unity
FastFlatten: Hierarchy Collapser
This package adds a new utility shortcut to the Unity editor; Collapse the currently active hierarchy! Normally it’s easy to end up with a cluttered hierarchy after working in a scene for a while, and the same goes for the project view. This this package allows you to quickly get your bearings and focus on your current work.
Getting started
The default shortcut to collapse a hierarchy is CTRL+G, this can of course be changed in Unity’s Shortcuts editor.
Pressing the collapse shortcut once will collapse all other items in the hieararchy while keeping your current selection expanded.
Pressing the collapse shortcut a second time after this will collapse the active selection as well, leaving a completely flattened hierarchy.