Learn to use the tools that all Apple applications share:
Spell checker and grammar checker
Every Apple application that comes on your Mac uses certain tools—the spelling and grammar checker, the Colors panel, the Fonts panel, the Dictionary, and a few others. Rather than tell you how to use each one within a certain application, included here are explanations of how to use each tool regardless of which application you’re using it in.
Many applications from other vendors also take advantage of these Apple tools, so look for them—they will make your computing life easier and more fun.
Options for the spell checker ...