Additional tabs appear on the Articulate Storyline ribbon when you select various objects on a slide. For example, the Format tab will appear when you select a shape, and the Options tab will appear when you select a video.
However, you may find that these tabs don't display as expected.
This issue was fixed in Update 4 for Storyline. To take advantage of the new features and fixes, download and install the latest version from the link in your product confirmation email, or get it here.