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I am typesetting a report using the achemso package, because it is required that my report be in American Chemical Society (ACS) format. However, I am not submitting to an ACS journal. It is required that my report be in 12 pt Times New Roman font with 1.5 line spacing. I think that achemso by default uses Times New Roman (that is what it looks like), and I can accomplish 1.5 line spacing with \onehalfspacing.

How can I accomplish 12 pt font size in achemso? I have tried:

\documentclass[12pt]{achemso}

But I get this warning/error:

LaTeX Warning: Unused global option(s): [12pt].

Is there any way I can still use achemso and enforce 12 pt font size?

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2 Answers 2

up vote 7 down vote accepted

In a word, 'no'. The achemso class is intended purely to support submissions to the ACS, and so has no features which are not needed for that purpose. The achemso package is intended to support producing more general documents which need some of the features of the class. You should use a suitable general class (for example report) and load appropriate packages.

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The real reason I am using achemso even though I am not submitting to the ACS is that achemso provides the correct bibliography formatting for use with my bibtex files; achemso correctly formats the citations, as well as uses the in-line superscript citation notation. I am worried that if I abandon achemso, it will be harder to use the superscript citation notation. –  Andrew Jun 15 '12 at 22:00
    
Do you have any recommendations? Thank you! –  Andrew Jun 15 '12 at 22:01
1  
The achemso package does the same set up as the class for the bibliography, so just \usepackage{achemso} should cover it. –  Joseph Wright Jun 15 '12 at 22:03

As of today, achemso's main font size is 12 pt. Quote from its source (https://github.com/josephwright/achemso/blob/master/achemso.dtx#L968):

\LoadClass[12pt,letter]{article}

Nevertheless, what you are asking for in general seems to be easily achievable. I wanted to use the achemso class (but not for ACS submission) and change the main font size (from 12 pt to 11 pt). This is what works well:

\let\titlefont\undefined
\usepackage[fontsize=11pt]{scrextend}

This solution is a combination of http://tex.stackexchange.com/a/5341/11816 and http://tex.stackexchange.com/a/35967/11816 -- without the undefinition of \titlefont, there is a clash between KOMA titlefont and achemso titlefont.

I'm interested to hear about disadvantages with this approach.

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Sounds a bit like von hinten durch die Brust ins Auge to be honest. –  Johannes_B Apr 8 at 19:51
    
@Johannes_B: sure. Application scenario: submission to a different non-ACS journal which only requires an 11 pt font size. Other than that, achemso fits perfectly fine. So, in that case, I'd say this is a viable option. –  Jan-Philip Gehrcke Apr 8 at 19:52

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