Hi Michael,

The selection methods in Moi are already very flexible, it was just a flying thought.

> What would it show then if only some objects of that slot were selected, just the same as if none were selected?

It could highlight if you select only one object of that container, being just an indicator as of where it is located in the browser.

> For example, say you have 1 sphere that has Style = Default selected. Now you drag that selection indicator to the Style = Red slot, which happens to have 100 lines associated with it. What is the ending selection supposed to be? Are all the lines supposed to get selected?

No, the lines would not be added to the selection, it would just reorganize the active selection.
If you have a handful of objects scattered in many styles, you could visually regroup them in one or in several containers.

it may be handy in complex situations.



It's a common feature in some 2d vector applications.
Here'e some examples featuring:

One orange square: layer 1
Two green squares: Layer 2
Nothing: layer 3

One green and one orange square are selected.


Expression 3.3:
A kind of "box" indicator appears over the color label of the layer of which at least one object is selected.





Illustrator 10:
Here a black square around the color label if you have everything selected in that layer.





Microsoft design:
Here only a frame for a partial selection and full square for everything selected in that layer.



In all of these examples you can drag that icon to reorganize the active selection.
It's a visual way of organizing objects in the tree.