Si certo…
`\documentclass[12pt,a4paper,oneside,titlepage]{book}
\usepackage[italian]{babel}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{setspace}
\usepackage[scaled=0.95]{helvet}
\renewcommand*{\familydefault}{\sfdefault}
\usepackage{textcomp}
\setcounter{tocdepth}{2}
\usepackage{frontespizio}
\usepackage{graphicx}
\usepackage{float}
\usepackage[font=scriptsize,labelfont=bf,labelsep=period,textfont=it]{caption}
\usepackage{colortbl}
\usepackage{multirow}
\usepackage{booktabs}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{tikz}
\usepackage[Lenny]{fncychap}
\ChTitleVar{\Large\bfseries}
\usepackage{titlesec}
\titleformat*{\section}{\Large\bfseries}
\titleformat*{\subsection}{\large\bfseries}
\titleformat*{\subsubsection}{\large\bfseries\sf}
\usepackage
{geometry}
\usepackage{fancyhdr}
\pagestyle{fancy}
\fancyhf{}
%\fancyhead[LE]{\small\thepage}
%\fancyhead[RE]{\small\nouppercase{\leftmark}}
\fancyhead[LO]{\small\nouppercase{\rightmark}}
\fancyhead[RO]{\small\thepage}
\begin{document}
\renewcommand*{\figurename}{Fig.}
\renewcommand*{\tablename}{Tab.}
\onehalfspacing
\include{frontespizio/frontespizio}
\tableofcontents
\include{capitoli/capitolo1}
\include{capitoli/capitolo2}
\include{capitoli/capitolo3}
\include{capitoli/capitolo4}
\include{capitoli/capitolo5}
\end{document}
`