If the Styles and Formatting
task pane is not open, click Styles and Formatting
on the Formatting
toolbar.
Right-click the style you want to modify, and then click Modify.
Select any options you want.
To see more options, click Format, and then click the attribute— such as Font or Numbering— you want to change.
Click OK after you've changed each attribute, and then repeat for any additional attributes you want to change.
Tip
To use the modified style in new documents based on the same template, select the Add to template check box. Word adds the modified style to the template that is attached to the active document.