HTC One Remix - Manual (Page 63)

§ To see more information, such as email previews and calendar
events, slide two fingers apart to expand a notification. To
collapse it, slide two fingers together.
§ Some notifications allow you to take immediate action. For
example, tap a missed call notification to return the call or reply
with a text message.
§ Tap the notification icon on the left to open the corresponding
app.
§ To dismiss just one notification in the list, drag it left or right. To
dismiss all notifications and close the Notifications panel, tap
.
Your first week with your new phone 63