Dreamweaver CS6 and CSS Image Gallery

According to the manual:

"The Basics: Editing the Gallery with the property inspector
Introduction
In this chapter we’re going to edit the properties of the gallery using the property inspector of Dreamweaver. Click on the preview of the gallery in the design view to display its properties. Below is a screenshot of the property inspector and a screenshot of the final result."

it should be possible to adjust the properties of the Gallery in the DW inspector. The problem is that I do not manage to see the properties for the whole gallery, but only for images.

How to see these properties?

Thanks in advance for your answer.

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