Add States In Value Lifeline
Adding states to a Value Lifeline is similar to adding states to a State Lifeline element.
For a Value Lifeline, only the first state displays on the diagram. The other states are added to a list to access when creating transitions; they only display on the Lifeline element as you create transitions to those states.
You can only edit or delete states in a Value Lifeline element using the 'States' tab of the 'Configure Timeline' dialog.