The Spell-Checker

  There is a spell checker to check the spelling of the words in your text. Any mis-spelled words in your text will not match the words in the dictionary, and will appear in the list of words not found in the Dictionary. If you check the spelling of your text before you add tags, your tags will appear as mis-spelled words, so spell-checking will be easier if you do it before you add your tags.

You can also save your corrected text to the file you're working on, or save it to a new file.