How to trigger editing of elements inside a reorderlist?

I installed the ajax control toolkit, the reorder list works fine, I can add items, but cannot find a way to edit the items.

How can I enable users to edit the item?

just add a button with CommandName

• CommandName="edit" to edit the item
• CommandName="delete" to delete the item
• CommandName="update" to update the item
• CommandName="cancel" to cancel the edit mode