Ask some symbols, such as the quadratic sum and intersection of x in mathematics, how to type the small numbers below the letters in the chemical formula? How do you spell the dots between English names? You can click Format-Effect-Superscript or Subscript in the toolbar in WORD.

If you use smart ABC, first click on the situation shown in the fourth picture: there is a period and comma until it becomes empty. Then press 2 while holding down the shift key.