Use the Layers panel to manage the visibility, creation and editing of layers. Use the and buttons to add and delete layers. You can rename a layer by double-clicking it’s existing name and reposition it by dragging it to the desired location. The visibility of layers is controlled using the symbol. The green eye shows a visible layer, the half white eye shows a grayed layer and the blank symbol shows an invisible layer. You can also control the scale of the layer with the layer scale pop-up menu. Select layer(s) and click the button to choose the options available for that selection. Set the active layer by clicking the icon and it will be replaced with a icon.