In this topic you will set some of the properties for the C1GalleryExtender to change the appearance of the thumbnails.

1. Select View | Properties Window in the Visual Studio menu.
2. Click the drop-down list at the top of the Properties window and select Panel1_C1GalleryExtender.
3. Set the C1GalleryExtender.ThumbsDisplay property to 2. Only two thumbnails will be displayed for the gallery at a time.
4. Set the C1GalleryExtender.ThumbnailOrientation property to Vertical. The thumbnails will appear vertically stacked to the right of the gallery.

The markup for the GalleryExtender will now look like this:

<cc1:C1GalleryExtender ID="Panel1_C1GalleryExtender" runat="server"

        TargetControlID="Panel1" ThumbnailDirection="After"

        ThumbnailOrientation="Vertical" ThumbsDisplay="2">

    </cc1:C1GalleryExtender>

Now run the project to see the gallery of images.