To check or uncheck all items in a shopping list:

Open the shopping list.

To check all items, select “Check All Items” from the menu. To uncheck all items select, “Uncheck All Items”.
You can check or uncheck all items in a shopping lists at once.
Open the shopping list.
To check all items, select “Check All Items” from the menu. To uncheck all items select, “Uncheck All Items”.