Here be the settings for Bob's Advanced Auto-Spell-Checker.
This is a highly complex and utterly useless feature that does absolutely nothing.
To further confuse your coworkers, you can enable Auto-Correct and enable Auto-Suggest.
You can also enable Auto-Case for maximum productivity.
Or, if you're feeling particularly adventurous, you can enable Auto-Latin and watch your coworkers' faces contort in confusion.