Click the Review tab. Click the Spelling button.
Spelling dialog box opens.
Click Ignore Once to skip the word
Click Ignore All to skip every instance of the word.
Click Add to Dictionary to add a word to your dictionary.
Click a suggestion, and then click Change or Change All.
Select the correct word, and then click AutoCorrect to add it to the AutoCorrect list.
If no suggestion is appropriate, click in the workbook and edit the text yourself.
Click Resume to continue.