Uncheck the Check spelling as you type and Mark grammar errors boxes as you type
Besides the option to automatically format characters in different types of Word - there are many users who don't know how to use, or even don't know the existence of this feature. To do so, open the AutoCorrect Options section in the Proofing section:
The main control window of AutoCorrect , select the AutoFormat As You Type tab, and uncheck the corresponding checkbox:
Hopefully, these basic tips can help you improve the speed and performance of Microsoft Word applications in your daily work. Good luck!