If you do not see this option it means the extension you're logged in with is not a member or manager of a Call Queue. You will have to log in to the Management Console, go to Call Queues, create a Call Queue (if you don't have one already) and add this extension as an agent or a manager.
Do bear in mind that the Wallboard displays call statistics only for Call Queues and that is why it is empty if you do not have any call queues created or selected.