(Update: Modellus new site is http://modellus.pt)
The new pan and zoom feature allows you to navigate through a larger animation area, tracking the movement of an object that has left the currently visible area or focus on a particular point.
You can zoom with the mouse wheel which zooms the animation to the area where the mouse is or you can pan by dragging the mouse on an empty area.
If you want to quickly zoom to a particular area you can do so by ctr+clicking the area.
Here’s a video demonstrating Pan and Zoom in action . This is not yet the final interface and will be subject to change, namely a small map will be available showing a zoomed out view of all the animation space.