A map layer is a collection of categorized features shown on the
map, such as roads, sidewalks or a bus stops.
Using the Map Contents and Legend panel, you can view
the list of layers in the map, turn the layers on and off in the map display,
and examine the symbols for layers.
To examine the map contents:
- Click the plus button
next to an item to expand an item. If the item is a collection of grouped layers,
this will expand the group to show the layers in that group.
- The check-box next to the layer indicates whether
the layer is currently visible in the map.
- You can click the check-box next to
the layer name to turn the layer on or off.
The map automatically redraws to reflect the
changes in layer visibility.
- Some layers may not be visible at the current map
scale (zoom level). This is indicated by a checkbox that is grayed out:
You may need to zoom the map in or out to see a particular layer displayed.
- If layers have a plus button
next to the name, you can expand the layer
to display the symbol assigned to that layer. Some layers have multiple symbols
according to categories contained within that layer.