Choose Edit > Spelling > Spelling.

The Spelling window opens and the first misspelled word is highlighted.

Each language has a different spelling dictionary. To make sure that the correct language is selected, select the text you want to work with, click Inspector in the toolbar, click the Text button, and then click More. Choose a language from the Language pop-up menu.

To replace the incorrect spelling in the text, double-click the correct word or spelling in the list of suggested corrections.

If the correct word doesn’t appear in the list of suggested corrections but you know the correct spelling, select the misspelled word in the Spelling window, type the correct word, and click Correct.

If the current spelling is correct and you want to leave it as it is, click Ignore or Learn. Use Learn if the term is one you use often and you want to add the term to the spelling dictionary.

If you used Learn and want to undo the effect of the Learn operation, do one of the following:

On Mac OS X version 10.4, type the word into the text field below the list of suggested corrections, and then click Forget.

On Mac OS X version 10.5, Control-click the word and choose Unlearn Spelling from the pop-up menu.

If no alternative spellings appear in the list of suggested corrections on Mac OS X version 10.4, select the misspelled word in the Spelling window and try a different spelling. Click Guess to see whether new possibilities appear in the list of suggested corrections.

Click Find Next and repeat steps 2 through 5 until you find no more spelling errors.