Why do some views open in new browser tabs?

Experiencing different browser behaviors

NSP’s navigation seeks to reduce clutter and the number of browser tabs opened when changing views. Some views may open in new tabs to facilitate referencing information against the current view or to allow you to continue working in the current view while, for example, a plotter works in another tab.

In general, you can predict the behavior based on the verb in the navigation item:

Utilities such as plotters, NE sessions, and watchlists open in new browser tabs.