How do I move or copy backlog items between backlog lists?

You can move or copy backlog items between backlog lists using cut & paste. To do this, select one or more backlog items, and use the right-click menu or the standard keyboard shortcuts to cut or copy the backlog items. Then paste them into the desired backlog list, either in the same backlog or another backlog in the same project.

You can, of course, also move a backlog item to another backlog list in the same backlog by dragging the backlog item to that backlog list.