You can change Layers naming from map layers page by clicking on the rename icon that appears on all layers. In order to save the layer name, you need to press Enter or click outside the text editing area. Accordingly, layer name will change globally across all the settings and map components; such as map legend and layer list,
please follow the screenshots below to see how you can rename a layer.
Now, repeat the same procedure with the other layers (Parcels and Urban Master Plan)
Finally, go to map to see how the names are reflected on layer list and legend