There are two settings dialogs for map layers, the Map Layer Settings dialog and the TMS Layer Settings dialog (Tile Map Service).
Map Layer Settings dialog:
TMS Layer Settings dialog:
To reach the Map Layer Settings or TMS Layer Settings dialog:
Right-click the map chart visualization.
Select Properties from the pop-up menu.
Comment: You can also click the map chart visualization to make it active and then select Edit > Visualization Properties.
Go to the Layers page, and click to select the Map Layer or TMS layer of interest.
Click Settings....