so at the moment i am writing a document in the class article. But i want the header you have when you use documentclass "book". I dont use class the "book" though because my document is not so long that i could use the chapter-command that generates those giant headlines. Is there a way to get the headers from the documentclass "book" or can i use the documentclass book somehow and use the normal \section command for the table of content? Because at the moment it puts an "0" in front of all my sections.