When you create a media-specific style, RoboHelp creates it from a generic style. When you delete the media-specific style, only that media-specific style is deleted; the generic style is not deleted.
Do one of the following:
•Right-click the style sheet in Project Manager and choose Edit. In the Styles dialog box, select the media-specific style you want to delete and click Delete.
•Select the media in the Format toolbar. Choose Project > Open > Pods > Style and Formatting. In the Styles and formatting pod, select the media-specific style you want to delete. Right-click and select Delete.