Options are primarily referred to by name. These names are case insensitive and underscores are ignored. For example, 'allexport' is equivalent to 'A__lleXP_ort'.
The sense of an option name may be inverted by preceding it with 'no', so 'setopt No_Beep' is equivalent to 'unsetopt beep'. This inversion can only be done once, so 'nonobeep' is not a synonym for `beep'. Similarly, 'tify' is not a synonym for 'nonotify' (the inversion of 'notify').
These pages do not describe all options that zsh knows. It just points out some of the more interesting ones for new users. For a complete documentations see zshoptions(1).