Apps: Publisher and Designer
Platforms: All
In the layers panel if you alt-click add new layer when you have a selection, all items in that selection are moved to the new layer created. In other words this behaves similar to grouping, but rather than creating a group it puts your selection into a new layer.
Additionally for desktop versions you will find a new option in the right click menu for "Move Selection to New Layer" which achieves the same thing.
This makes it far easier to organise your work into layers, without having to create an empty layer first and drag the items you want into it.