Your Godot version:

Issue description:
The Description section of the CanvasGroup documentation is not sufficient to provide the understanding on the nodes actual purpose, function, or application.

The node is said to draw its children as one object, but that clearly is not the case
as shown here godotengine/godot-proposals#11038
and here https://forum.godotengine.org/t/z-index-grouping-flattening/126580

Then it is said to "draw overlapping translucent 2D nodes without blending" but for me personally these words do not click together into a comprehensible message. What is "translucency", for a 2D node? Assuming it means "partially transparent", the phrase appears to offer blending without blending, which I feel needs to be elaborated on as to how that is useful or possible.

URL to the documentation page:
https://docs.godotengine.org/en/4.5/classes/class_canvasgroup.html