Setting up layers

Layers are handled internally by the class IlvManagerLayer. Layers can be accessed by their index or by their instance (a pointer to an IlvManagerLayer ). By default, a manager is created with one layer. However, you can specify how many layers you want to create for a manager in the second parameter of the IlvManager constructor.
Once the manager has been created, you can modify the number of layers using the following methods:
void addLayer(int index)    
void removeLayer(int index, boolean redraw)    
and retrieve the number of layers with:
int getLayersCount()