To move multiple items to a different shopping list, please tick the checkboxes next to the desired items and then tap Copy (the two overlapping pages icon) at the top of the screen.

You will then select the destination list in the pop-up that appears on the screen. The items will be copied over to the indicated shopping list.

If you cannot see the checkboxes next to your items, please enable them from: Settings – Items – Checkboxes to delete