Item selection in DoubleList
Item selection can be performed in different ways. Users can drag a particular item from one list to another. A double click on the item will work as well. And finally, users can click one of the available buttons that are intended for moving a single item or all the items at once from one list to another.
Custom buttons for DoubleList
The buttons of this control can be customized if needed. You can use one of the available approaches. There's a possibility to use HTML code that will define the appearanece of your buttons. You can also hide the default buttons and specify the custom method of selecting.