You can give URL Action through Images other than URL object and action.
To add URL Action from images, follow below steps :
1. Add a image in the dashboard either as a tiled or floating object.
2. After selecting the image and placing it, now click on the drop down button from the window and click on Set Target URL.
3. Now provide required URL to open web page. (URL should be static cannot be dynamic.)
Hope this helps you.