How do you select and group multiple layers swiftly in Illustrator? Obviously you can tick them one by one and group after that but I am looking way for grouping layers selected between two shift + click's in the menu.
I'm not entirely certain what you mean by "group layers". You can group objects but you can't group layers.
Collect in New Layer from the
Layers Panel menu will combine highlighted layers in the Layers panel to a single layer with sub-layers.