How to switch off chapter and section numbering in the whole document?

Question

I want "Introduction" instead of "1. Introduction". The same with all sections and subsections. In the KoMa-classes if possible

I've googled like mad, but the only solution I found is usinge \chapter*{introduction} and then manually adding those chapters to the index-counter and the ToC.

I can't believe that there's no easy solution to this. Lots of people write informal books in latex which shouldn't look like scientific standard publications

Answer 1

From the KOMA-Script manual, section 3.16, "Document Structure":

So to deactivate numbering of chapters, section, subsection etc. and only number parts, you can use

\setcounter{secnumdepth}{\partnumdepth}

in the document preamble.

And if you do not want to number anything:

\setcounter{secnumdepth}{-\maxdimen}