How to open WinB's DND mode?

In Windows 8.1 and Windows RT 8.1, there is a brand new function, the English name is: quiet hours, which is to adjust the display time of the APP notification. During the set silence time, the user will not receive any APP notification, the specific operation method As follows:
First, call the Charms charm button through Win+C, or Win+I to open the settings panel, click Change "Computer Settings";

Second, in "Search & Application & rdquo; select & ldquo; & rdquo ;, handover notification to & ldquo; quiet periods & rdquo; Free is adjusted to disturb the notification time;


third, also can select those below the panel The APP app can notify us in a timely manner without being affected by the DND mode during this time period.