You can move a piece of edging by clicking and dragging it. If the member is attached to any other edging members, the other members move along with it.
To move edging:
Select the edging you want to move. If you want to move multiple members, use Shift+click to select the other members.
Hover your pointer over the center
blue grab handle to display the Move cursor.
Click and drag to move the edging, then release your mouse button.