Selection Methods 

Some lists, trees and grids allow you to select only a single item, while others allow you to select one or more items. If you are permitted to select multiple items, the items may either be next to each other (adjacent) or not (non-adjacent).

In the various selection methods, the anchor refers to the current item (indicated by the dotted  gray outline ), which is usually a selected item (indicated by the solid  blue highlight ) but can be split off onto an unselected item as described below.