How do I zoom?
You can zoom by using the middle mouse wheel in either the upper or lower displays. If your computer's mouse does not have a middle mouse wheel, you can use "z" to zoom in and "x" to zoom out. The point under the mouse cursor will not move during the zoom. So you should first move the mouse cursor to the rough location of a feature point, and then zoom in to it.
For more information, contact us at firstname.lastname@example.org