Suppose you are typing, you make a mistake, and you see the red wavy underline.
Suppose you correct the mistake, but in the meantime you have lost your rhythm and your idea. To avoid these distractions, you can turn off the spell check and check the spelling manually when you have finished typing. It is done like this.
Click File > Options > Proofing , clear the Check spelling as you type box, and click OK .
To enable spell check again, repeat the process and select the Check spelling as you type check box .
To check spelling manually, click Check > Spelling and Grammar .
But remember to turn the spell check back on. Spelling and grammar mistakes can seriously undermine what you're trying to communicate, especially if your boss, or your teacher, or that HR person sees them.