Spell Check As You Type
When editing, you can turn on automatic spell checking by selecting Enable SCAYT from the Spell Check As You Type menu item. It is denoted by an ABC icon with a checkmark. Once enabled, you can even spell check different languages.
Clicking on the Check Spelling menu option will bring up a full spell check pop-up with a grammar checker and a thesaurus. Unfortunately, the grammar checker and thesaurus are not available when the language is set to Canadian English.