1 To open the Font dialog box, either click the button in the lower right corner of the Font group or press Ctrl-d. 2  Choose the font type and size that you want to be the default every time you open Word. 3  In the bottom left corner of the Font window, click.4  When prompted to confirm, click. To open the Font dialog box, either click the button in the lower right corner of the Font group or press Ctrl-d. 2  Choose the font type and size that you want to be the default every time you open Word. 3  In the bottom left corner of the Font window, click.