Complex sentence: Whereas the file menu commonly contains commands about handling of files, such as open, save, and print, the edit menu commonly contains commands relating to the handling of information within a file, e.g. cut and paste and selection commands.
Split into simpler sentences: Whereas the file menu commonly contains commands about handling of files, such as open, save, and print. The edit menu commonly contains commands relating to the handling of information within a file, e.g. cut and paste and selection commands.