Pan
To explore different areas of the canvas, select the Hand tool , then click and drag in any direction to move the canvas around.
While drawing or editing you can quickly switch to Hand tool by holding or by pressing and holding the mouse wheel button. Releasing the key or the mouse middle button will switch back to your previous tool.
Zoom
There are multiple ways you can zoom into the canvas. The easiest way is by simply using the mouse wheel to quickly zoom in or out. Another option is to use the Zoom tool or to directly set the zoom level with the help of the zoom control.