For each picture or media file a separate page will be created with navigation to next and previous pages. One or more index pages will show thumbnail images of all pictures, each linked to the corresponding page in the gallery. Galerie will work with a selection in iPhoto, or with a selection in a browser window of GraphicConverter, or with a selection in a iView MediaPro catalog, or with files or folders dragged from the Finder. Collections of editable templates and many options enable creating a large variety of different galleries with different designs and different features.
You do not need to know any html to use Galerie fully, but if you do have some experience with Web editing, you can go a step further by editing or creating templates yourself.