☞ To update a style, follow these steps:
Step 1: Open Styles window.
Step 2: Click on that Style category icon whose style you want to update.
Step 3: Now, Double-Click on that style which you want to update.
Step 4: Select the text and add the formatting.
Step 5: Click on Styles Action icon.
Step 6: Click on ‘Updated Selected Style’ option.