You can use the 'My Layers' function to show a 'key' or table of all loaded layers that you have selected from various categories.
Please Note: In order to use the 'my layers' function, you must have added at least one layer to the map. See 'Adding Map Layers' for details.
Up to three loaded layers can be shown in 'my layers' at any one time. The icons which appear on the map (indicating the placement of a feature) correspond to those found in the table, so that you can identify which symbols relate to which layer.
Loaded layers can be removed from the map by simply unchecking each box in the table. Removing layers in this way will cause the layer to disappear from the list.