The menu bar’s contents always provide all the possible actions for any view of your data.
File: Anything related to a file or to the operations of the application usually falls under this menu, such as creating things, saving them to disk, printing them, and quitting the program itself.
Edit: Contains tools to edit text and most configuration options.
View: Allows configuring the appearance of Evolution.
Message: Contains actions that can be applied to a message.
Folder: Contains actions that can be performed on folders.
Search: Lets you search for messages, or phrases within a message. You can also see previous searches you have made.
Help: Opens the Evolution application help.