The changes that you can make depend on the node that you select. 
            
             - If the node has attributes, you can edit their values in the grid on the right.
 
             - To add additional attributes, right-click the node and select Add Attributes or Add All Attributes.
 
             - If the node allows it, you can add a child node by right-clicking and selecting Insert Child Node.
 
             - To delete a node, right-click and select Delete This Node.