[Blender] Collection Grid

This is an add-on for Blender 2.90+.
It adds a widget to the 3D viewport header that lets you quickly manage the visibility of your collections, similar to the layers panel of classic Blender 2.79. 

It also comes as a panel on the N sidebar -- you can set in the preferences if you only want the panel, the header widget or both.

Other than that, it's really simple to use! You click on a cell to toggle the visibility of that collection.
The empty circle icon means that a collection has one or more objects in it, and the filled circle icon means that a collection has the current active object.

The button on the left of the panel lets you toggle the visibility of all collections at once (and if you hold Ctrl while clicking it, it also toggles the visibility of all objects). 
The button on the right is the "Link to Collection" operator, letting you add the selected objects to a new or preexisting collection.

Contact

rafanavega@hotmail.com