You can create lights and organize them into groups in the Light Editor. This way, you can adjust multiple lights simultaneously, and your Light Editor interface appears more streamlined and organized.
Click any of the (point light), (spotlight), (area light), (directional light), and (volume light) icons to create a light.
If a group is currently selected in the Light Editor, the newly created light is automatically added to this group. Otherwise, the light is created but does not belong to any group. You can also create a light within a group by right-clicking the group and selecting the light you want from the marking menu.
Click New Group to create a group, and middle-drag and drop lights to include or exclude them from a group.
Each light can only belong to one group.