# [OS X TeX] colorbox

Alain Schremmer Schremmer.Alain at verizon.net
Mon Feb 7 19:15:03 EST 2005

Amazing what a well-placed "t" will do!
Thanks very much: it does look a lot better.
Regards
--schremmer

Ross Moore wrote:

> Hi Alain, and Chris,
>
> On 08/02/2005, at 10:13 AM, Alain Schremmer wrote:
>
>> In the following, I am unable to let the fraction on the top line
>> have  the same size as the one on the second line which is made
>> pleasantly  smaller by the colorbox.
>> While it is of course of infinitesimal importance, I would be happy
>> if  someone could show me what I am missing.
>
>
> Your first \frac  is in display-mode, due to the {equation*} and/or
> {split} environments.
> The second \frac is within $...$ inside a box, so is inline-mode
> mathematics, the
> same as if it were in ordinary paragraphs.
>
> Since you are using {amsmath} anyway, take advantage of the \dfrac
> command,
> to use \displaystyle layout within inline mathematics.
>
> Similarly use \tfrac to use inline (\textstyle) layout within displays.
> This is very useful for small numerical fractions, such as
> \tfrac{1}{2}  etc.
>
>
>
>> Regards
>> --schremmer
>>
>> \documentclass[11pt]{book}
>>        \usepackage{amsmath}
>>        \usepackage{color}
>>        \DeclareMathAlphabet{\denom}{OT1}{cmss}{sbc}{n}
>> \begin{document}
>> \begin{equation*}
>> \begin{split}
>>        8\;\denom{Dimes}
>>    &=
>> 3\;\denom{Apples}\times1\;\frac{\denom{Dimes}}{\denom{Apple}}  +
>> 4\;\denom{Dimes}
>>    \\      &=
>> \colorbox{yellow}{$3\;\denom{Apples}$}\times\colorbox{yellow}{$2\; >> \frac{\denom{Dimes}}{\denom{Apple}}$} +1\;\denom{Dimes}
>> \end{split}
>> \end{equation*}
>> \end{document}
>
>
>
>>
>> Christopher Allen wrote:
>>
>>>> I had done quite a bit of experimentation and, indeed, "couldn't
>>>> accept" that a command would take things "out of math mode".
>>>
>
> Whenever you put things inside a box, this happens
> --- unless someone has gone to a lot of trouble to
> write coding that remembers what the mode was outside
> of the box, and recreate it on the inside.
>
> The use of a box is so that the contents can be typeset
> in a self-contained fashion.
>
> There are many times when you want to use non-math layout
> within a part of a mathematical expression.
> It makes a lot more sense to have the default behaviour this
> way than to automatically inherit from the outer environment.
>
>>>
>>>
>>> There are a few commands that do this, the most obvious one is
>>> \text{}, specifically used to do so.
>>>
>>> There are also commands that will take you into math mode in a
>>> similar fashion. For example, if you use \boxed{} in the middle of
>>> a  paragraph, whatever is put into the box is typeset in math mode.
>>
>
> There's also a command \ensuremath{....}
> that's useful in places where you don't know whether you'll
> be using it within math or not.
>
>
> Hope this helps,
>
>     Ross
>
>>>
>>> Chris
>>>
>
> ------------------------------------------------------------------------
> Ross Moore                                         ross at maths.mq.edu.au
> Mathematics Department                             office: E7A-419
> Macquarie University                               tel: +61 +2 9850 8955
> Sydney, Australia                                  fax: +61 +2 9850 8114
> ------------------------------------------------------------------------
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