User Interface Conventions
Contextual menus: one button mouse/trackpad users on Mac OS X can hold down the Ctrl key while clicking to display a contextual menu for the current user interface element. Users with two button (or more) mice can simply click the right button to display a contextual menu for the current user interface element.
Throughout the manual various operations will be performed by right-clicking on user interface elements. One button mouse users should instead Ctrl-click on the indicated user interface element.