Some vector images consist of one base layer made up of one or more CAD layers.
In the Layers window, base layers have a plus sign (+) beside their name.
Layers window
To expand a base layer:
In the Layers window:
1. Right mouse click the name of the base layer to expand.
2. From the menu that appears, choose Expand.
The Layers window lists the names of the CAD layers. The names are slightly indented. The base edit layer now has a minus sign (-) beside its name.
You can display or hide and change the color of CAD layers. You can also consolidate the base layer and its CAD layers into a single edit layer. For details, click Consolidating edit layers.