When you type text into a cell , Excel automatically formats it in the Arial font with a text size of 10 points. The 12-point font size is considered typical for business documents (the higher the point size, the bigger the text is; there are approximately 72 points in an inch). You can select from several fonts (such as Baskerville, Modern, or Rockwell) and change the size of any font characters in a cell. You can also apply special font attributes, such as bold, italic, and underline.
Before you take a look at applying different font attributes to the cells in a worksheet, take a look at how you change the default font for all your Excel workbooks. This enables you to select a different font and font size for your worksheets.
To change the default font, follow these steps: