An All/None option replaces the buttons previously available for selecting and deselecting all items that are listed in certain windows. This new feature allows you to toggle the "Mark All" and "Unmark All" options in these windows simply by clicking on a conveniently located button. The All/None option has also been added to windows in which all items formerly could be selected only through the Select All option on the Edit menu, making it easier to select or unmark the entire list of items in those windows. The new option appears at the top of the far right column in the illustration below.
