If you want to customize a bullet style to add to your style sheet, you can do so from the Styles dialog.
From the Format menu, click Styles. The Styles dialog opens.
In List, select All Styles.
From Available in, select the style sheet name.
From the Styles list, select the style to base the new style on (for example, Bullets), then click New. The New Style dialog opens.
In the Name text box, enter the name of the new style (for example, "NewBullets") you want to create. Type right over the text that is displayed. The style name cannot include any characters other than letters and numbers and cannot begin with a number.
Under Style type, select Paragraph.
Under Style for following paragraph, select (No Change).
To further customize the new style, click Format and select the attributes you want to change.
Click OK to save your settings.
Click Close when you finish modifying the style.