Image Content Toolbar
As soon as an image content is added, the Image Content Toolbar appears on top of the image:

Through this toolbar, the story editor is able to perform the following operation:
-
Change media source
accessing the Media Editor -
Change size
choosing between Small, Medium, Large -
Hide caption button
to show/hide the description under the image: this button is present only if a description has been provided for the image resource (see the Media Editor tool for example) -
Remove
the image content