Choose View→Style group→Style.
On the Style dialog box, in the Style Types box, click the style type you want.
In the Style box, click the style you want to change.
Click the Modify button to open a dialog box based upon the style type you clicked.
To base the style on an existing style, click a style from the list in the Based On box.
Click the other tabs on the dialog box and set the options you want to modify.
After you close the dialog box, the software updates all elements formatted with the modified style throughout the document.
Tip:
If an element has a style, you can override the style by editing the element's properties with the Properties command on the Edit menu.
You can remove style overrides by re-applying a style.
You can modify one or more styles with the Style command on View→Style group.