LaTex的粗体、斜体和下划线

简单的文本格式有助于突出文档中的重要概念并使其更具可读性。使用斜体、粗体或带下划线的词可以改变读者的看法。

本文将介绍三种基本的文本格式化工具：斜体、粗体和下划线。让我们从一个例子开始：

Some of the \textbf{greatest} 
discoveries in \underline{science} 
were made by \textbf{\textit{accident}}.

如您所见，共有三个基本命令，它们可以嵌套以获得组合效果。

注意：来自纯 TeX 的原始文本格式命令\it（斜体）和\bf（粗体）仍然可以在 LaTeX 文档中使用，但不鼓励使用，也不推荐使用，因为它们不保留以前的样式。例如，当使用那些旧命令时，您不能同时应用斜体和粗体。

斜体文本

要使文本斜体很简单，请使用\emphor或者\textit命令：

Some of the greatest 
discoveries in science 
were made by \emph{accident}.

粗体文字

要使文本粗体使用\textbf命令：

Some of the \textbf{greatest} 
discoveries in science 
were made by accident.

带下划线的文字

要为文本添加下划线，请使用以下\underline命令：

Some of the greatest 
discoveries in \underline{science} 
were made by accident.

强调文字

可以使用\emph命令强调文本。有时该\emph命令的行为与 \textit一样，但并不完全相同：

Some of the greatest \emph{discoveries} 
in science 
were made by accident.\textit{Some of the greatest \emph{discoveries} in science were made by accident.}\textbf{Some of the greatest \emph{discoveries} in science were made by accident.}

该\emph命令对其参数的实际作用取决于上下文——在普通文本中，强调的文本是斜体的，但如果在斜体文本中使用，则此行为相反——参见上面的示例。此外，一些软件包，例如Beamer，会改变\emph命令的行为。

全套示例

以下示例收集了本文中包含的各种代码片段，以便您可以在 Overleaf 中将它们全部打开。

First example, bold, italics and underline:Some of the \textbf{greatest} discoveries in \underline{science} were made by \textbf{\emph{accident}}.\vspace{1.5cm}Example of italicized text: Some of the greatest discoveries in science were made by \emph{accident}.\vspace{1.5cm}Example of boldface text:Some of the \textbf{greatest} discoveries in science were made by accident.\vspace{1.5cm}Example of underlined text:Some of the greatest discoveries in \underline{science} were made by accident.\vspace{1.5cm}Example of emphasized text in different contexts:Some of the greatest \emph{discoveries} in science were made by accident.\textit{Some of the greatest \emph{discoveries} in science were made by accident.}\textbf{Some of the greatest \emph{discoveries} in science were made by accident.}

PS:该文从overleaf的帮助教程中翻译，请见Bold,_italics_and_underlining