## CGAL::Naviagtion_layer

#include <CGAL/IO/Navigation_layer.h>

### Inherits From

Qt_widget_layer

### Creation

Naviagtion_layer nav_layer ( QObject* parent = 0, const char* name = 0);
| parent is the parent widget and name is the name you give to this layer.

This layer is used to provide basic navigation control over the Qt_widget. When this layer is attached and active, you may use the arrows to navigate the equivalent in world coordinates of 10 pixels in the desired direction. You can also use the PageUp, PageDown keys to scroll the equivalent in world coordinates of half screenheight on the Y axes.