There is a way to have Sue Center check your spelling as you type. Put the word 'SPELL' in the message area and choose 'Go'. This will turn spell checking on. Do the same to turn it off. Spell checking is on by default.
When checking is ON words that you enter will be looked up in the dictionary. If a word is not found a warning sound will be made. This sound can be changed by choosing Browse > Configure > Sounds - at the bottom.
Words chosen from the word list will not be spell checked - only the ones you enter by yourself.