# classicthesis and titlesec

I'm still trying to make classicthesis work. The problem now is that I get lots of warnings about titlesec... As a matter of fact, with this preamble

\documentclass[a4paper,11pt]{scrbook}

%fonts
\usepackage{mathpazo}

\usepackage{classicthesis}
\usepackage{arsclassica}

\usepackage{lipsum}


I get this kind of headers

I've read about incompatibility between titlesec and KOMA script, but I haven't been able to understand how to fix it. Thank you for your help.

• You can (probably) silence the warnings, but that does not fix the fact, that classicthesis is in wide parts incompatible with KOMA-script. – Johannes_B Feb 28 '16 at 17:12
• And titlesec is not compatible with KOMA too. I think, there are a lot of questions that deal with this issue and you've been told so already, as far as I can remember – user31729 Feb 28 '16 at 17:12
• classicthesis assumes the KOMA-option headinclude and footinclude, else the header will be on the edge of the page. – Johannes_B Feb 28 '16 at 17:16
• classicthesis really just defines a bit of the optical appearance. All functionality, chapters, sections, referencing and citing, list generation etc. is basic LaTeX functiionality and available without any template. – Johannes_B Feb 28 '16 at 17:19

I just pretend the question contains questions:

1. What is the warning concerning titlesec about?
2. Why are my headers looking horrible?

1) The classicthesis template uses scrreprt with the option headinclude and footinclude, which are passed over to package typearea.

Package classicthesis defines the size of the typeblock, ensuring that package typearea is loaded, but not taking into account the options passed to it. So you have to always add the options globally. Or use package geometry to change the margins, which makes using the package classicthesis pointless, as it only defines the style.

2) Opposed to it, the author of classicthesis decided to tweak the appearance of sectional headings using package titlesec, which in the meantime issues a quite prominent warning by KOMA-script, because it breaks some KOMA functionality.

You can (probably) silence the warnings, but that does not fix the fact, that classicthesis is in wide parts incompatible with KOMA-script.

A little example:

\documentclass[