Match the four editing windows to their respective features. first window
second window
third window
fourth window
previewing the clips and applying filters
and transitions
tracking all edit changes
storing and listing the shooting material
viewing the final edited portions

An informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.