In order to add an image:
-Adjust the photo in the photoshop
-Log in to the administrator
-Enter into the "Media Manager"
-Choose the folder named "stories"
-In that folder you upload the photo.
-Enter into the "Article Manager" and choose the article in which your photo has to be added.
-In that article, choose the area where your image must be displaced.
-Then click on button"image"
-Choose the image from the needed folder and then click on the add button.