The order of layers and layer groups in the Layers panel in Studio and JMap NG is intended to improve the user experience, especially for projects with a large number of layers.
To reorder layers and layer groups in the panel:
Hover over the layer or group to move until the drag icon
appears.
Click
then drag the layer or group to the desired position and drop it.
The map remains unchanged, but the Layers panel reflects the new order.

