The Overview panel gives you the option to navigate to specific sections of the model. It is located on the top left corner of the canvas.
Overview Window
You can see a full presentation of the model on the Overview panel.
The image inside the blue framepresents your current zoomed view of the whole model in the canvas.
Moving Canvas
You are able to quickly move the canvas through the Overview panel. Just hold left click on your mouse and move it around to see the objects on the canvas moving.