强制某些 \section 文本不大写

Question

我有一个文档，其配置如下。我尝试使用 \MakeLowercase 强制某些部分中的某些文本不大写，但收到警告（下图）。我想知道如何解决这个问题。

\documentclass[
    12pt,       
    openright,   
    twoside,    
    a4paper,     
    chapter=TITLE, 
    section=TITLE,
    english,
    french,
    spanish,
    brazil, 
]{abntex2}


\usepackage{lmodern}    
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc} 
\usepackage{lastpage}       
\usepackage{indentfirst}        
\usepackage{color}          
\usepackage[final]{graphicx}    
\usepackage{microtype}          
\usepackage[table,xcdraw]{xcolor}
\usepackage{hyperref}
\usepackage{subcaption}
\usepackage{epigraph}
\usepackage{url}
\usepackage{placeins}
\usepackage{multirow}
\usepackage[figuresright]{rotating}
\usepackage{chemfig}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{enumitem}
\usepackage{bigints}
\usepackage{environ}
\usepackage{listings}
\usepackage[brazilian,hyperpageref]{backref} 
\usepackage[alf]{abntex2cite}


\begin{document}

\chapter{Foo}

\section{This is my title \MakeLowercase{this cannot be capitalized!} foo bar}

\end{document}

Answer 1

以下是适用于 的解决方案hyperref。如果hyperref未加载，您可以像\lowercase这样使用：\section{Foo \lowercase{no upper case} bar}

如果hyperref加载了，则会导致警告（“PDF 字符串中不允许使用令牌...”），因此我们必须另外使用\texorpdfstring。我为此定义了一个\titlelowercase宏。现在您必须使用\section{Foo \titlelowercase{no upper case} bar}：

\documentclass[
    12pt,       
    openright,   
    twoside,    
    a4paper,     
    chapter=TITLE, 
    section=TITLE,
    english,
    french,
    spanish,
    brazil, 
]{abntex2}


\usepackage{lmodern}    
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc} 
\usepackage{lastpage}       
\usepackage{indentfirst}        
\usepackage{color}          
\usepackage[final]{graphicx}    
\usepackage{microtype}          
\usepackage[table,xcdraw]{xcolor}
%\usepackage{hyperref}% hyperref is loaded by the class abntex2
\usepackage{subcaption}
\usepackage{epigraph}
\usepackage{url}
\usepackage{placeins}
\usepackage{multirow}
\usepackage[figuresright]{rotating}
\usepackage{chemfig}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{enumitem}
\usepackage{bigints}
\usepackage{environ}
\usepackage{listings}
\usepackage[brazilian,hyperpageref]{backref} 
\usepackage[alf]{abntex2cite}

\newcommand\titlelowercase[1]{\texorpdfstring{\lowercase{#1}}{#1}}

\begin{document}
\tableofcontents
\chapter{Foo}

\section{This is my title \titlelowercase{this cannot be capitalized!} foo bar}

\end{document}

您不妨使用\MakeTextLowercase而不是\lowercase。它由包提供（也textcase由 加载）并且应该处理一些字符（据我所知）。abntex2\lowercase

Answer 2

该类使用textcase提供的命令\MakeTextUppercase将标题大写。这可用于\NoCaseChange您不想大写的部分。

\documentclass[
    12pt,       
    openright,   
    twoside,    
    a4paper,     
    chapter=TITLE, 
    section=TITLE,
    english,
    french,
    spanish,
    brazil, 
]{abntex2}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{babel}

\usepackage{lmodern}
% other packages
% ...

\usepackage{hyperref} % should be last

\begin{document}

\chapter{Foo}

\section{This is my title \NoCaseChange{this cannot be capitalized!} foo bar}

\end{document}