The map layers are shown in the list in the upper portion of the dialog. Drag layers up or down. Double-click a layer to open the Layer Symbology Editor for the clicked layer
From the context menu a set of actions for the map layers are available. Most of these actions are also available from the toolbar.
Note: Setting a layer invisible in the Layer Manager does not unload the layer from the Toolbox.
**Add Layer… **
Adds a GIS file from a local disk or network location.
**Remove Selected Layer **
Removes the selected map layer. Only external layers can be removed from the Layer Manager.
**Layer Symbology… **
Shows the Layer Symbology Editor for the selected layer.
**Move Up **
Moves the selected layer up.
**Move Down **
Moves the selected layer down.