Getting Started : Using the map viewer : Reordering layers using the Map Content and Legend Pane

Reordering layers using the Map Content and Legend Pane
Using the Map Content and Legend pane, you can reorder layers that appear in the pane. If the layer is a grouped layer, the entire group can be dragged to another position. You can also reorder layers within a group. However, you cannot remove a layer from the group.
NOTE: 
Depending on the scale, these layers are displayed in the map viewer in the descending order of the layers as shown in the Map Content and Legend pane. For example, consider a scenario where you are viewing the Building and Parcels layers and you want to view the underlying Zones layer without the buildings and the parcels. You can drag the Zones layer to a position above the Building layer and the Parcels layer. The following screenshot shows how layer reordering affects the visibility of layers in the map viewer.r
Figure 10