How to open WinB's DND mode?

There is a new feature in Windows 8.1 and Windows RT 8.1. 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 is as follows:

First, call the Charms charm button through Win+C, or Win+I to open the settings panel, click Change & ldquo;Computer Settings>;

Second In "Search & Apps", select “notify”, switch to the do not disturb time of the adjustment notification in "quiet time";

Third, also below the panel You can also choose to notify us when the APP app can be affected by the DND mode during this time.