How to change default font
Excel
2003
This setting enables you to select a different font and font size for your worksheets.
To change the default font, follow these steps:
1. Select Tools -> Options....
2. In the Options dialog box, on the General tab, in the Standard font area:

- Use the drop-down list to select a new font
- Use the Size drop-down list to select a new default font size.
3. When you click the OK button, Excel makes your preference the default font and size.