Group
To group multiple layers, you can:
Select multiple elements (by holding ⇧)
Right-click on the selection and select “Group” in the menu
Alternatively, you can hit ⌘G (or ctrl G on Windows).
Ungroup
To ungroup layers, you can:
Select the group you want to break
Right-click and select “Ungroup” in the menu
Alternatively, you can hit ⇧⌘G (or ⇧ ctrl G on Windows).