Could you please help me find how I could put the numbers of the pages on the top of each page as is used in classicthesis? This is my mwe :
\documentclass[fontsize=12pt,%
twoside=semi,%
headings=small,%
chapterprefix=true,%
listof=flat]%
{scrbook}
\addtokomafont{pageheadfoot}{\scshape\small}%changed to small caps in headers
\usepackage{lipsum}
\begin{document}
\chapter{A chapter}
\lipsum
\chapter{Another chapter}
\lipsum
\end{document}

scrlayer-scrpageand its commands to alter pagestyle. – TeXnician Feb 15 '17 at 11:43scrlayer-scrpageis a package not a class. See the KOMA-Script manual (scrguide.pdf or scrguien.pdf) for more information. – Schweinebacke Feb 16 '17 at 15:36classicthesishad been used. – Schweinebacke Feb 16 '17 at 15:36