Every time I'm working in an Illustrator file with multiple layers and hundreds of objects on those layers that sometimes aren't grouped yet, I find it hard to select click on the objects in the layers panel on the right, selecting them via shift-click (you know, selecting all objects between the first and the last clicked object).
Is there a way I can select layer objects with the shift-option and afterwards have all of the items selected on the artboard? See the images for illustration.
There used to be a clunky way: Wiping over the object names (entries in the Layers palette) while holding down the Option key.
It may not work this way in the AI version you're using, though.