Click on the layer list icon in the tool bar located at the top of the map viewer to display the layer list in your map viewer.
Note: If any layers appear grayed out and do not show in the map, you will need to zoom in to view them (some layers have viability scales set on them so they cannot be viewed at large scales)
Clicking on the three dots on the right side of a layer displays the layer menu, which includes the following functions:
Click on the iconin the upper right corner of the layer list panel to control the behavior of all layers. This gives you the ability to turn all layers on and off and expand or collapse all layers.
Click on the legend icon to open the legend panel. This displays all of the layers added to the map and their corresponding symbology