Frequently Asked Question List for TeX

If you want to take advantage of the powerful `\newtheorem`

command
without the constraint that the contents of the theorem is in a sloped
font (for example, you may want to use it to create remarks, examples, proofs,
…) then you can use the AMSLaTeX `amsthm`

package
(which now supersedes the `theorem`

package previously
recommended in these answers).
Alternatively, the following sets up an environment
`remark`

whose content is in the default roman font.

```
\newtheorem{preremark}{Remark}
\newenvironment{remark}%
{\begin{preremark}\upshape}{\end{preremark}}
```

The `ntheorem`

package provides control of the fonts used by
theorems, directly.

FAQ ID: Q-theoremfmt

Tags: *math*