The main Author window, the Library Explorer, provides a number of command buttons that are grouped under the following tabs:
Certain buttons, when clicked, will carry out commands immediately, while others display a window that allows you to enter additional information. If an button is followed by "...", it will display a window. Otherwise, the command is carried out immediately.
For more information about the Review tab, View tab and Publish tabs, see 
Video: Review, view, publishing ribbons