A quick way to change the appearance of your spreadsheet is to change the font of the text. A font is a set of letters, numbers, and punctuation symbols designed around a shared appearance. A font will have variations for size and styles, such as bold and italics.
In addition to changing the font type, you can amplify your project using other features in the Font group such as Bold, Italic, or Underline.
Select the text you want to format.
Click the Bold, Italic, or Underline buttons on the Home tab.
To bold, press Ctrl + B.
To italicize, press Ctrl + I.
To underline, press Ctrl + U.
Click the Dialog Box Launcher in the Font group to see additional font formatting options. From the dialog box, you can change the underline style and add effects.