Click on the icon representing four small blue squares 
at the bottom left of the module to open the gallery. It displays all the images of the module as a mosaic. You can choose the series from the menu on the left. On the right is the set of images of the selected series. Then click on the thumbnail of the image of your choice
You can also pass the mouse cursor over the thumbnail images at the bottom of a module. An information bubble appears, click on it to access the image of your interest.
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