\chapter[#1: {\itshape#2}]{#1\\[2ex]\Large\itshape#2}

don't function

for a result like this:

enter image description here

My code:

\documentclass[10pt,%                      % corpo del font principale
               a4paper,%                   % carta A4
               twoside,openright,%         % fronte-retro
%              oneside,openany,%           % solo fronte
               titlepage,%                 % frontespizio
               headinclude,,footinclude,%  % testatina e piede di pagina
               BCOR5mm,%                   % rilegatura di 5 mm
               cleardoublepage=empty,%     % pagine vuote senza testatina e piede di pagina
               tablecaptionabove,%         % didascalie in cima alle tabelle
               ]{scrreprt}                 % classe report di KOMA-Script;

%\usepackage[T1]{fontenc}                   % codifica dei font:
                                           % NOTA BENE! richiede una distribuzione *completa* di LaTeX,
                                           % per esempio TeXLive o MiKTeX *complete*

%\usepackage[utf8]{inputenc}                % codifica di input; anche [latin1] va bene
                                           % NOTA BENE! va accordata con le preferenze dell'editor

%\usepackage[english,italian]{babel}        % per scrivere in italiano e in inglese;
                                           % l'ultima lingua (l'italiano) risulta predefinita


\usepackage{indentfirst}                   % rientra il primo capoverso di ogni sezione

\usepackage{graphicx}                      % immagini

\usepackage{listings}                      % codici

\usepackage[font=small]{quoting}           % citazioni

\usepackage{amsmath,amssymb,amsthm}        % matematica

\usepackage[italian]{varioref}             % riferimenti completi della pagina

\usepackage{mparhack,fixltx2e,relsize}     % finezze tipografiche

\usepackage{tabularx}                      % tabelle di larghezza prefissata


\addbibresource{Bibliografia.bib}          % database di biblatex 

\usepackage{subfig}                        % sottofigure, sottotabelle

\usepackage{lipsum}                        % testo fittizio

\usepackage{eurosym}                       % simbolo dell'euro

\usepackage[eulerchapternumbers,%          % numeri dei capitoli nel font Euler
            subfig,%                       % se si usa il pacchetto subfig
            beramono,%                     % Bera Mono come font a spaziatura fissa
            eulermath,%                    % AMS Euler come font per la matematica
            pdfspacing,%                   % migliora il riempimento di riga
            listings,%                     % codici
%           parts,%                        % da decommentare in un documento diviso in parti
            ]{classicthesis}               % stile ClassicThesis

\usepackage{arsclassica}                   % modifica alcuni aspetti di ClassicThesis

    \setbox0=\hbox{\chapterNumber\thechapter\hspace{10pt}\vline\ }%

\usepackage{bookmark}                      % segnalibri

\input{impostazioni-tesi}                  % file con le impostazioni personali




  • 2
    arsclassica defines a style that reproduces the looks of a very special book. Changing that would violate its purpose. The current implementation of ` arsclassica` does not allow for your change and would need re-implementation. – Johannes_B May 13 '15 at 19:40
  • 3
    Can you extend your question? Add a real question perhaps? What is it, you want to achieve? – Johannes_B May 13 '15 at 19:43
  • Do you want to achieve what is shown in the picture or is this the current non-working state? I twould be really nice if you can add a minimal working example to show us what is going on. Please also add, what you are trying to achieve. – Johannes_B May 13 '15 at 20:57
  • 2
    Please give the OP time to react, before Close-Voting or Low-Quality-issues – user31729 May 13 '15 at 21:00

What about


    \chapter[#1: \textit{#2}]{#1}%
    \nobreak\vspace{\glueexpr \bigskipamount*3 \relax}%
    % Adjust this factor as needed ..........^



\Chapter{Il titolo}{E il sottotitolo}



The result looks like this: Output produced

Edit: You might also want to consider


    \chapter[#1: \textit{#2}]{#1}%
    \nobreak\vspace{\glueexpr \bigskipamount*3 \relax}%
    % Adjust this factor as needed ..........^



\Chapter{Il titolo}{E il sottotitolo}



with reduced vertical spacing between title and subtitle.

  • \vspace{3\bigskipamount} is as good. – egreg May 13 '15 at 22:11
  • @egreg, I'm surprised of you! Don’t you mind the stretch and shrink components? – GuM May 13 '15 at 22:16
  • Not for a chapter heading. The spacing parameters for them should be rigid. – egreg May 13 '15 at 22:17
  • @egreg: You're probably right (as you always are ;-) Edit: of course, you don't need my permission to edit my answer. – GuM May 13 '15 at 22:27
  • I am truly grateful to you for the help – Federico Calio' May 14 '15 at 19:59

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