Using a mouse with a wheel

A mouse with wheel is a conventional 2-button mouse that is equipped with a mouse wheel between the left and right mouse button. This mouse wheel allows you to zoom in on your design and to navigate in dialog boxes.

You can use the mouse wheel to:

Zoom sections: move the wheel. You can zoom in (by turning the mouse wheel in a forward direction) and zoom out (by turning the mouse wheel in a backward direction). The zoom factor is 20%. The center for the operation is the cursor.
In dialog boxes: you can scroll up and down by turning the mouse wheel accordingly.