如何为整个文档正确选择具有压缩宽度的 Helvetica？
方法 1
为此，我使用了helvet包并设置：
\renewcommand{\familydefault}{\sfdefault}
\renewcommand{\seriesdefault}{c}
以下 MWE 在不同系统上给出不同的结果。
\documentclass{scrartcl}
%\documentclass{article}
\usepackage{helvet}
\usepackage{lipsum}
\renewcommand{\familydefault}{\sfdefault}
\renewcommand{\seriesdefault}{c}
%\renewcommand{\bfdefault}{bc}
\author{Author}
\title{Title}
\begin{document}
\maketitle
\section{Section}
\lipsum
\end{document}
在我的本地机器（TL2019）上，输出正如我预期的那样，在 Overleaf（TL2019）上，文本和标题字体仍然具有标准宽度。
背面日志：
This is pdfTeX, Version 3.14159265-2.6-1.40.20 (TeX Live 2019) (preloaded format=pdflatex 2019.12.13) 13 MAY 2020 12:59
entering extended mode
\write18 enabled.
%&-line parsing enabled.
**Stadtgeographie.tex
(/compile/Stadtgeographie.tex
LaTeX2e <2019-10-01> patch level 3
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Package: scrkbase 2019/12/23 v3.28 KOMA-Script package (KOMA-Script-dependent b
asics and keyval usage)
(/usr/local/texlive/2019/texmf-dist/tex/latex/koma-script/scrbase.sty
Package: scrbase 2019/12/23 v3.28 KOMA-Script package (KOMA-Script-independent
basics and keyval usage)
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Package: keyval 2014/10/28 v1.15 key=value parser (DPC)
\KV@toks@=\toks14
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Package: scrlfile 2019/12/23 v3.28 KOMA-Script package (loading files)
))) (/usr/local/texlive/2019/texmf-dist/tex/latex/koma-script/tocbasic.sty
Package: tocbasic 2019/12/23 v3.28 KOMA-Script package (handling toc-files)
\scr@dte@tocline@numberwidth=\skip41
\scr@dte@tocline@numbox=\box27
)
Package tocbasic Info: omitting babel extension for `toc'
(tocbasic) because of feature `nobabel' available
(tocbasic) for `toc' on input line 137.
Class scrartcl Info: File `scrsize11pt.clo' used instead of
(scrartcl) file `scrsize11.clo' to setup font sizes on input line 221
1.
(/usr/local/texlive/2019/texmf-dist/tex/latex/koma-script/scrsize11pt.clo
File: scrsize11pt.clo 2019/12/23 v3.28 KOMA-Script font size class option (11pt
)
) (/usr/local/texlive/2019/texmf-dist/tex/latex/koma-script/typearea.sty
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(typearea) \topskip = 11.0pt
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(typearea) \baselineskip = 13.6pt
(typearea) on input line 1718.
)
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\c@section=\count82
\c@subsection=\count83
\c@subsubsection=\count84
\c@paragraph=\count85
\c@subparagraph=\count86
\scr@dte@section@maxnumwidth=\skip47
Class scrartcl Info: using compatibility default `runin=bysign'
(scrartcl) for `\section on input line 4722.
Class scrartcl Info: using compatibility default `afterindent=bysign'
(scrartcl) for `\section on input line 4722.
\scr@dte@part@maxnumwidth=\skip48
Class scrartcl Info: using compatibility default `afterindent=false'
(scrartcl) for `\part on input line 4730.
\scr@dte@subsection@maxnumwidth=\skip49
Class scrartcl Info: using compatibility default `runin=bysign'
(scrartcl) for `\subsection on input line 4740.
Class scrartcl Info: using compatibility default `afterindent=bysign'
(scrartcl) for `\subsection on input line 4740.
\scr@dte@subsubsection@maxnumwidth=\skip50
Class scrartcl Info: using compatibility default `runin=bysign'
(scrartcl) for `\subsubsection on input line 4750.
Class scrartcl Info: using compatibility default `afterindent=bysign'
(scrartcl) for `\subsubsection on input line 4750.
\scr@dte@paragraph@maxnumwidth=\skip51
Class scrartcl Info: using compatibility default `runin=bysign'
(scrartcl) for `\paragraph on input line 4760.
Class scrartcl Info: using compatibility default `afterindent=bysign'
(scrartcl) for `\paragraph on input line 4760.
\scr@dte@subparagraph@maxnumwidth=\skip52
Class scrartcl Info: using compatibility default `runin=bysign'
(scrartcl) for `\subparagraph on input line 4770.
Class scrartcl Info: using compatibility default `afterindent=bysign'
(scrartcl) for `\subparagraph on input line 4770.
\abovecaptionskip=\skip53
\belowcaptionskip=\skip54
\c@pti@nb@sid@b@x=\box28
Package tocbasic Info: omitting babel extension for `lof'
(tocbasic) because of feature `nobabel' available
(tocbasic) for `lof' on input line 6001.
\scr@dte@figure@maxnumwidth=\skip55
\c@figure=\count87
Package tocbasic Info: omitting babel extension for `lot'
(tocbasic) because of feature `nobabel' available
(tocbasic) for `lot' on input line 6013.
\scr@dte@table@maxnumwidth=\skip56
\c@table=\count88
Class scrartcl Info: Redefining `\numberline' on input line 6177.
\bibindent=\dimen102
) (/usr/local/texlive/2019/texmf-dist/tex/latex/psnfss/helvet.sty
Package: helvet 2005/04/12 PSNFSS-v9.2a (WaS)
) (/usr/local/texlive/2019/texmf-dist/tex/latex/lipsum/lipsum.sty (/usr/local/t
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Package: expl3 2019-11-07 L3 programming layer (loader)
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File: l3deprecation.def 2019-04-06 v L3 Deprecated functions
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f
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Package: lipsum 2019/01/02 v2.2 150 paragraphs of Lorem Ipsum dummy text
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)) (/compile/output.aux)
\openout1 = `output.aux'.
LaTeX Font Info: Checking defaults for OML/cmm/m/it on input line 14.
LaTeX Font Info: ... okay on input line 14.
LaTeX Font Info: Checking defaults for T1/cmr/m/n on input line 14.
LaTeX Font Info: ... okay on input line 14.
LaTeX Font Info: Checking defaults for OT1/cmr/m/n on input line 14.
LaTeX Font Info: ... okay on input line 14.
LaTeX Font Info: Checking defaults for OMS/cmsy/m/n on input line 14.
LaTeX Font Info: ... okay on input line 14.
LaTeX Font Info: Checking defaults for OMX/cmex/m/n on input line 14.
LaTeX Font Info: ... okay on input line 14.
LaTeX Font Info: Checking defaults for U/cmr/m/n on input line 14.
LaTeX Font Info: ... okay on input line 14.
LaTeX Font Info: Trying to load font information for OT1+phv on input line 1
4.
(/usr/local/texlive/2019/texmf-dist/tex/latex/psnfss/ot1phv.fd
File: ot1phv.fd 2001/06/04 scalable font definitions for OT1/phv.
)
LaTeX Font Warning: Font shape `OT1/phv/c/n' undefined
(Font) using `OT1/phv/m/n' instead on input line 14.
Package scrbase Info: activating english \contentsname on input line 14.
Package scrbase Info: activating english \listfigurename on input line 14.
Package scrbase Info: activating english \listtablename on input line 14.
LaTeX Font Info: Font shape `OT1/phv/bx/n' in size <10.95> not available
(Font) Font shape `OT1/phv/b/n' tried instead on input line 16.
LaTeX Font Info: Font shape `OT1/phv/bx/n' in size <20.74> not available
(Font) Font shape `OT1/phv/b/n' tried instead on input line 16.
LaTeX Font Info: External font `cmex10' loaded for size
(Font) <14.4> on input line 16.
LaTeX Font Info: External font `cmex10' loaded for size
(Font) <7> on input line 16.
LaTeX Font Info: Font shape `OT1/phv/bx/n' in size <14.4> not available
(Font) Font shape `OT1/phv/b/n' tried instead on input line 17.
[1
{/usr/local/texlive/2019/texmf-var/fonts/map/pdftex/updmap/pdftex.map}] [2] (/c
ompile/output.aux)
LaTeX Font Warning: Some font shapes were not available, defaults substituted.
)
Here is how much of TeX's memory you used:
13078 strings out of 492164
266380 string characters out of 6125314
666680 words of memory out of 5000000
17463 multiletter control sequences out of 15000+600000
540873 words of font info for 37 fonts, out of 8000000 for 9000
1141 hyphenation exceptions out of 8191
46i,6n,78p,10110b,317s stack positions out of 5000i,500n,10000p,200000b,80000s
{/usr/local/texlive/2019/texmf-dist/fonts/enc/dvips/base/8r.enc}</usr/local/t
exlive/2019/texmf-dist/fonts/type1/urw/helvetic/uhvb8a.pfb></usr/local/texlive/
2019/texmf-dist/fonts/type1/urw/helvetic/uhvr8a.pfb>
Output written on /compile/output.pdf (2 pages, 18065 bytes).
PDF statistics:
20 PDF objects out of 1000 (max. 8388607)
13 compressed objects within 1 object stream
0 named destinations out of 1000 (max. 500000)
1 words of extra memory for PDF output out of 10000 (max. 10000000)
方法 2
在 Overleaf 设置上
\renewcommand{\seriesdefault}{mc}
\renewcommand{\bfdefault}{bc}
有效。但这会为我本地机器上的章节标题提供错误的字体宽度。日志列出了有关系列选择的警告mc：
LaTeX Font Info: Checking defaults for OML/cmm/m/it on input line 14.
LaTeX Font Info: ... okay on input line 14.
LaTeX Font Info: Checking defaults for OMS/cmsy/m/n on input line 14.
LaTeX Font Info: ... okay on input line 14.
LaTeX Font Info: Checking defaults for OT1/cmr/m/n on input line 14.
LaTeX Font Info: ... okay on input line 14.
LaTeX Font Info: Checking defaults for T1/cmr/m/n on input line 14.
LaTeX Font Info: ... okay on input line 14.
LaTeX Font Info: Checking defaults for TS1/cmr/m/n on input line 14.
LaTeX Font Info: ... okay on input line 14.
LaTeX Font Info: Checking defaults for OMX/cmex/m/n on input line 14.
LaTeX Font Info: ... okay on input line 14.
LaTeX Font Info: Checking defaults for U/cmr/m/n on input line 14.
LaTeX Font Info: ... okay on input line 14.
LaTeX Font Info: Trying to load font information for OT1+phv on input line 1
4.
(/usr/local/texlive/2019/texmf-dist/tex/latex/psnfss/ot1phv.fd
File: ot1phv.fd 2001/06/04 scalable font definitions for OT1/phv.
LaTeX Warning: Font shape declaration has incorrect series value `mc'.
It should not contain an `m'! Please correct it.
Found on input line 21.
LaTeX Warning: Font shape declaration has incorrect series value `mc'.
It should not contain an `m'! Please correct it.
Found on input line 24.
LaTeX Warning: Font shape declaration has incorrect series value `mc'.
It should not contain an `m'! Please correct it.
Found on input line 27.
LaTeX Warning: Font shape declaration has incorrect series value `mc'.
It should not contain an `m'! Please correct it.
Found on input line 47.
我article也尝试了这门课程，但遇到了类似的问题。
答案1
您是否愿意使用 XeLaTeX 或 LuaLaTeX 代替 pdfLaTeX？如果是这样，以下使用该fontspec包及其\setmainfont宏的解决方案可能会让您感兴趣。（测试程序使用 Arial 和 Arial Narrow 主要是因为我的电脑上没有 Helvetica Condensed。）
\documentclass{article}
\usepackage{fontspec}
\newcommand\qbf{The quick brown fox jumps over the lazy dog.}
\newcommand\test{\qbf\par\textbf{\qbf}\par\textit{\qbf}\par\textit{\textbf{\qbf}}}
\begin{document}
\setmainfont{Arial}
\test
\medskip
\setmainfont{Arial Narrow}
\test
\end{document}