In Writer is is not able to change / access the formate of ex. "Standard" or "Headline" - Definition. The cursor is in the textline or to selekt the hole line than press F11 - key or by mouse context menu format doesn´t work. Best regards
Look at attachment 118235 [details] for a workaround (or upgrade to 5.0.2). *** This bug has been marked as a duplicate of bug 83546 ***