If you haven’t already, turn on the News app from the Apps panel. Instructions can be found here. Then, click the “News" app button on the OneLaunch dock.
To view a news article, simply click on its tile in the list. The arrow buttons located on the far right-hand side and far left-hand side of the News app panel can be used to navigate through the full list of articles available.
The drop-down menu at the top of the News app panel can be used to change the category of news articles shown.