An example of this in Vanilla Method would be the Edit Customer screen, whose tab link doesn't show in the Customer tab until you access a customer record via the Customer List screen or by some other means. Also, after you leave the Edit Customer screen, it's tab link becomes hidden again.
I know about the "show/hide tab link" action, and I see how I can use that on the exit button on my screen to hide the link when I'm done with the page. But what about having the tab link be hidden when I first login to Method?