This example adds the ability to create a new item by dragging it on a row. Simply click on a row, move to a certain size, and release to create an item of that size, on the row.
In dnd-kit, multi-select is not officially supported, an reuires work-arounds.
This example implements a simple workaround, that allows selecting items by clicking them, and them dragging all of them at once.
In this example, all items are moved relative to their initial position.