Assign Legend to Lighting Device

This is a quick command that will allow you to assign a Label Legend to a single or multiple selection of Lighting Devices with three clicks.
Create Label Legend from Lighting Device

This is a smart way to cut out the repetitive process of styling new Label Legends and the positions of particular label fields.
Label Legend Manager

This small dialog is the route you should use to create and edit the data fields associated with Label Legends.