Help:Editing

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This information is an abbreviated set of tips from the relevant mediawiki help page.


<tr> <td>
  • Leading spaces
Leading spaces are another way to preserve formatting. Putting a space at the beginning of each line stops the text from being reformatted. It still interprets Wiki markup and special characters: → </td> <td>
 Putting a space at the beginning of
 each line stops the text   from
 being reformatted. It still interprets
 Wiki markup and special characters: &rarr;

</td> </tr>


<tr> <td colspan="2">

Images and tables

</td> </tr>

<tr> <td> A picture, including alternate text:

Darwin's theory

You can put the image in a frame with a caption:

Darwin's theory

</td> <td>


A picture, including alternate text:

[[Image:Darwin.gif|Darwin's theory]]

You can put the image in a frame with a caption:

[[Image:Darwin.gif|frame|Darwin's theory]]

</td> </tr>

<tr> <td>

Emphasize text with two apostrophes on each side. Three apostrophes emphasize it strongly. Five apostrophes is even stronger.

''Emphasize text'' with two apostrophes
on each side. Three apostrophes
emphasize it '''strongly'''. Five
apostrophes is '''''even stronger'''''.

A single newline has no effect on the layout.

But an empty line starts a new paragraph.

A single newline has no
effect on the layout.

But an empty line
starts a new paragraph.

You can break lines
without starting a new paragraph.

You can break lines<br>
without starting a new paragraph.

You can use HTML tags, too. Some useful ways to use HTML:

Put text in a typewriter font. The same font is generally used for computer code.


Strike out or underline text, or write it in small caps.

Superscripts and subscripts: x2, x2

Invisible comments that only appear while editing the page. Comments should usually go on the talk page, though.

HTML markup should be used sparingly, and only if it is difficult or impossible to achieve the desired result otherwise.

You can use <b>HTML tags</b>, too.
Some useful ways to use HTML:

Put text in a <tt>typewriter font</tt>.
The same font is generally used for
<code>computer code</code>.

<strike>Strike out</strike> or
<u>underline</u> text, or write it
<span style="font-variant:small-caps">
in small caps</span>.

Superscripts and subscripts:
x<sup>2</sup>, x<sub>2</sub>

Invisible comments that only appear
while editing the page.
<!-- Note to editors: blah blah. -->
Comments should usually go on the
talk page,though.

HTML markup should be used sparingly,
and only if it is difficult or
impossible to achieve the desired
result otherwise.

Contents

Section headings

Headings organize your writing into sections. The Wiki software can automatically generate a table of contents from them.

Subsection

More equals signs creates a subsection.

A smaller subsection

Don't skip levels, e.g. from two to four equals signs. Start with two equals signs; don't use single equals signs.

== Section headings ==

Headings organize your writing into
sections. The Wiki software can
automatically generate a table of
contents from them.

=== Subsection ===

More equals signs creates a subsection.

==== A smaller subsection ====

Don't skip levels, (''e.g.''  from
two to four equals signs. Start with
two equals signs; don't use single
equals signs.

Lists

  • Unordered lists are easy to do:
    • Start every line with a star.
      • More stars indicate a deeper level.
  • A newline
  • in a list

marks the end of the list.

  • Of course you can start again.
* ''Unordered lists'' are easy to do:
** Start every line with a star.
*** More stars indicate a deeper level.
* A newline
* in a list  
marks the end of the list.
* Of course you can start again.
  1. Numbered lists are also good:
    1. Very organized
    2. Easy to follow

A newline marks the end of the list.

  1. New numbering starts with 1.
# Numbered lists are also good:
## Very organized
## Easy to follow
A newline marks the end of the list.
# New numbering starts with 1.

You can make horizontal lines to separate text.


But you should usually use sections instead, so that they go in the table of contents.

You can make horizontal lines
to separate text.
----
But you should usually use
sections instead, so that they
go in the table of contents.

Links

Here's a link to a page named reciprocal space.

You can put formatting around a link. Example: reciprocal space.

Here's a link to a page named
[[reciprocal space]].

You can put formatting around a link.
Example: ''[[reciprocal space]]''.

Link to a page section by its title:

If multiple sections have the same title, add a number. #Example section 3 goes to the third section named "Example section".

Link to a page section by its title:

* [[Ewald sphere#Definition]]
* [[Ewald sphere#History]]


If multiple sections have the same
title, add a number.
[[#Example section 3]] goes to the
third section named "Example section".

Make a link point to a different place with a 'piped link'. Put the link target first, then the pipe character "|", then the link text.

Make a link point to a different
place with a 'piped link'. Put
the link target first, then the
pipe character "|", then the link text.

* [[Main_Page|front page]]
* [[Ewald sphere#History|see below]]

Make an external link just by typing a URL: http://www.iucr.org

Give it a title: IUCr

or leave the title blank: [1]

Make an external link just by
typing a URL:
http://www.iucr.org

Give it a title:
[http://www.iucr.org IUCr]

or leave the title blank:
[http://www.iucr.org]

Category links don't show up, but add the page to a category.

Add an extra colon to actually link to the category: Category:English documentation

Category links don't show up, but
add the page to a category.
[[Category:English documentation]]

Add an extra colon to actually link
to the category:
[[:Category:English documentation]]

Just show what I typed

A few different kinds of formatting will tell the Wiki to display things as you typed them.

  • <nowiki> tags

The nowiki tag ignores Wiki ''markup''. It reformats text by removing newlines and multiple spaces. It still interprets special characters: →

<nowiki>
The nowiki tag ignores Wiki markup.
It reformats text by removing
newlines    and multiple spaces.
It still interprets special
characters: &rarr;
</nowiki>
  • <pre> tags
The pre tag ignores Wiki markup.
It also doesn't     reformat text.
It still interprets special
characters: →
<pre> 
The pre tag ignores Wiki markup.
It also doesn't     reformat text.
It still interprets special
characters: &rarr;
<nowiki>
</nowiki>

</pre>

This is
a table

</td> <td>

{| border="1" cellpadding="5" align="center"
! This
! is
|- 
| a
| table
|}

</td> </tr>

<tr> <td colspan="2">

Mathematical formulas

</td> </tr> <tr> <td>

You can format mathematical formulas with TeX markup.

\sum_{n=0}^\infty \frac{x^n}{n!}

</td> <td>

<math>\sum_{n=0}^\infty \frac{x^n}{n!}</math>

</td> </tr>

<tr> <td colspan="2">

Special characters

</td> </tr>

<tr> <td> Umlauts and accents:

À Á Â Ã Ä Å Æ Ç È É Ê Ë Ì Í Î Ï Ñ Ò Ó Ô Õ Ö Ø Ù Ú Û Ü ß à á â ã ä å æ ç è é ê ë ì í î ï ñ ò ó ô œ õ ö ø ù ú û ü ÿ </td> <td>

&Agrave; &Aacute; &Acirc; &Atilde; &Auml; &Aring;
&AElig; &Ccedil; &Egrave; &Eacute; &Ecirc; &Euml;
&Igrave; &Iacute; &Icirc; &Iuml; &Ntilde; &Ograve;
&Oacute; &Ocirc; &Otilde; &Ouml; &Oslash; &Ugrave;
&Uacute; &Ucirc; &Uuml; &szlig; &agrave; &aacute;
&acirc; &atilde; &auml; &aring; &aelig; &ccedil;
&egrave; &eacute; &ecirc; &euml; &igrave; &iacute;
&icirc; &iuml; &ntilde; &ograve; &oacute; &ocirc;
&oelig; &otilde; &ouml; &oslash; &ugrave; &uacute;
&ucirc; &uuml; &yuml;

</td> </tr>

<tr> <td> Punctuation:

¿ ¡ « » § ¶ † ‡ • - – — </td> <td>

&iquest; &iexcl; &laquo; &raquo; &sect; &para;
&dagger; &Dagger; &bull; &ndash; &mdash;

</td> </tr>

<tr> <td> Commercial symbols:

™ © ® ¢ € ¥ £ ¤ </td> <td>

&trade; &copy; &reg; &cent; &euro; &yen; &pound; &curren;

</td> </tr>

<tr> <td> Greek characters:

α β γ δ ε ζ η θ ι κ λ μ ν ξ ο π ρ σ ς τ υ φ χ ψ ω Γ Δ Θ Λ Ξ Π Σ Φ Ψ Ω </td> <td>

&alpha; &beta; &gamma; &delta; &epsilon; &zeta;
&eta; &theta; &iota; &kappa; &lambda; &mu; &nu;
&xi; &omicron; &pi; &rho; &sigma; &sigmaf;
&tau; &upsilon; &phi; &chi; &psi; &omega;
&Gamma; &Delta; &Theta; &Lambda; &Xi; &Pi;
&Sigma; &Phi; &Psi; &Omega;

</td> </tr>

<tr> <td> Math characters:

∫ ∑ ∏ √ − ± ∞ ≈ ∝ ≡ ≠ ≤ ≥ × · ÷ ∂ ′ ″ ∇ ‰ ° ∴ ø ∈ ∩ ∪ ⊂ ⊃ ⊆ ⊇ ¬ ∧ ∨ ∃ ∀ ⇒ ⇔ → ↔ ↑ ℵ ∉ </td> <td>

&int; &sum; &prod; &radic; &minus; &plusmn; &infin;
&asymp; &prop; &equiv; &ne; &le; &ge;
&times; &middot; &divide; &part; &prime; &Prime;
&nabla; &permil; &deg; &there4; &oslash;
&isin; &cap; &cup; &sub; &sup; &sube; &supe;
&not; &and; &or; &exist; &forall; &rArr; &hArr;
&rarr; &harr; &uarr;
&alefsym; &notin;

</td> </tr>

</table>