我正在使用 ConTeXt 和 XeTex。因此，我正在编译我的文档：texexec --xetex foo.tex
我想遵循转换，将标题全部转换为 Sans Serif，将正文转换为 Serif。我想用自己的字体来实现这一点：
%&context
\definetypeface[BerlinSSDB][ss][sans][Berlin Sans FB Demi]
\definetypeface[Minion][rm][Xserif][Minion Pro]
\setupbodyfont[Minion, 12pt]
\setuphead[chapter][
style=\ss,
sectionnumber=yes
]
\setuphead[section][
style=\ss,
sectionnumber=no
]
\starttext
\chapter{Welcome}
A well known text, used to fill space.
\section{H. Rackham 1914}
But I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system, and expound the actual teachings of the great explorer of the truth, the master-builder of human happiness... But who has any right to find fault with a man who chooses to enjoy a pleasure that has no annoying consequences, or one who avoids a pain that produces no resultant pleasure?
\stoptext
Minion Pro 中会出现所有内容，包括标题、正文等。这似乎是合理的，因为我没有告诉它要使用什么字体，除了说“使用 Minion”。（我认为\setupbodyfont，使用的正文一词的含义与我这里的意思不同。）
答案1
答案出奇的简单：在你的例子中，行中的第一个项
\definetypeface[BerlinSSDB][ss][sans][Berlin Sans FB Demi]
只是一个标识符，可以是任何东西。如果您想要一整套 (rm + sans)，则需要使用相同的标识符，以便 ConTeXt 知道这些字体形成一个集合。所以这是重写的示例（我已经用其他字体进行了测试，因为我没有您使用的字体；最好为您的 MWE 使用通用字体）：
\definetypeface [Oxinabox] [rm] [Xserif] [Minion Pro]
\definetypeface [Oxinabox] [ss] [Xsans] [Berlin Sans FB Demi]
\setupbodyfont [Oxinabox, 12pt]
\setuphead[chapter][
style=\ss,
sectionnumber=yes
]
\setuphead[section][
style=\ss,
sectionnumber=no
]
\starttext
\chapter{Welcome}
A well known text, used to fill space.
\section{H. Rackham 1914}
But I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system, and expound the actual teachings of the great explorer of the truth, the master-builder of human happiness... But who has any right to find fault with a man who chooses to enjoy a pleasure that has no annoying consequences, or one who avoids a pain that produces no resultant pleasure?
\stoptext
但正如其他人所说的，如果你真的想使用 ConTeXt，最好看看 luatex/mkiv。它几乎可以完成 XeTeX 的所有功能，甚至更多。
答案2
由于您刚开始使用 ConTeXt，我建议您使用 LuaTeX 后端而不是 XeTeX。
借助 luatex 支持（称为 Context MkIV），您可以使用 simplefonts 模块，该模块可以轻松加载 Opentype/Truetype 字体。例如（我将字体更改为通用字体）并进行了一些样式更改。使用 编译文档context <filename>。
\usemodule[simplefonts][size=12pt]
\setmainfont[Linux Libertine O]
\setsansfont[Dejavu Sans]
\setuphead
[chapter]
[
style=\ssb, % Same as \ss but uses bigger font size
sectionnumber=yes, % Note the comma!
]
\setuphead
[section]
[
style=\ssa, % Same as \ss but uses bigger font size
sectionnumber=no, % Note the comma!
]
\starttext
\chapter{Welcome}
A well known text, used to fill space.
\section{H. Rackham 1914}
But I must explain to you how all this mistaken idea of denouncing pleasure
and praising pain was born and I will give you a complete account of the
system, and expound the actual teachings of the great explorer of the truth,
the master-builder of human happiness... But who has any right to find fault
with a man who chooses to enjoy a pleasure that has no annoying
consequences, or one who avoids a pain that produces no resultant pleasure?
\stoptext