Auto spell check option checks each word as it is typed and displays a wavy red line under any misspelled words. Once the word is corrected, the red wavy line disappears. This can be done through clicking the icon.
To perform a separate spelling check on the document (or a text selection) click the Spelling and Grammar button. This checks the document or selection and opens the Spelling dialog box if any misspelled words are found, This can be achieved by clicking the icon

Here are some more features of the spelling tool:
- Right-click on a word with a wavy underline, to open a powerful context menu. Correct words can be selected from the suggested words on the menu. The selection will replace the misspelled word with correct word. Other menu options are discussed below.
- The dictionary language can be changed (For example, Spanish, French, or German) from the Spelling dialog box.
- The new words can be added to a dictionary. Click Add in the Spelling dialog box and pick the dictionary to add it to.