If the box in unchecked, the feature is disabled.
If the box is checked, the feature if enabled. On the AutoCorrect tab, you can disable features you dislike, such as the auto capitalization of first letters of sentences, and disable this feature all together. You can also add new automatic corrections on words you commonly mistype or remove words you do not want automatically corrected. On the AutoCorrect window, you can disable features you dislike, such as the auto capitalization of first letters of sentences, and disable this feature all together.
