Zoom and pan
If you want to get a closer (or wider) look at your diagram, use the zoom dropdown in the toolbar to set the zoom . Use the + and – buttons to zoom in (or out) on a specific area of the diagram by clicking the Drawing Canvas. To zoom in a very specific area, click the +, draw a rectangle around that area, and then release.
If you want to move around a large diagram without using the browser’s scroll bars, from the toolbar click the Pan button and then click, drag, and release.
Holding down the space bar on your keyboard automatically switches your cursor to the pan tool.