Hi,
Thank you for contacting us.
You can start a slideshow in RadImageGallery as soon as the page is loaded with JavaScript;
Adding a NavigateUrl to each image doesn't seem to be supported at this moment,
Here is a link to the feedback portal where you can track the progress of the bug and vote to increase its priority.
http://feedback.telerik.com/Project/108/Feedback/Details/129390-add-radimagegallery-imagegalleryitem-navigateurl-property
The only way to have links for each image is to add them on the client with JavaScript.
You could also develop your own custom control that fetches images, similar to our NewsRotator widget sample;
http://docs.sitefinity.com/newsrotator-widget-create-the-newsrotator-as-a-user-widget
I hope the above information helps. Please let me know if you have any additional questions or concerns. In the case, please share how and where you have implemented this.
Regards,
Dimitri Cools
Telerik
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