2.5.2-18 Activating a Previously Opened Window

The user should be able to activate a window by performing any of a set of simple actions in that window or related to that window.

Additional Information:
A window might be activated by moving the pointing cursor to the window and performing any action, including pressing a key or a button on a cursor control device, issuing a command to open a specific window, selecting a window title from a list on a menu, or selecting an icon representing the window.