It's very easy to edit a Wiki page. Just click on the "Edit this page" link at the top or bottom (also on the sidebar) of a Wiki page to change the page itself, or click on "Discuss this page" link and then on "Edit this page" to write on the corresponding talk page. This will bring you to a page with a text box containing the editable text of that Wiki page.
Then type away, write a short edit summary on the small field below the edit-box and when finished press "Save"! You can also preview your changes before saving if you like. Depending on your system, pressing Enter while the edit box is not active (there is no typing cursor in it) may have the same effect as pressing Save.
It is often more convenient to copy and paste the text first into your favorite text editor, edit and spell check there, and then paste back into the browser to preview. This way, you can also keep a local backup copy of the pages you authored so that you can make changes offline.
When editing a page, a logged-in user has the option of flagging the edit as a "minor edit". When to use this is somewhat a matter of personal preference. The rule of thumb is that an edit of a page that is spelling corrections, formatting, and minor rearranging of text should be flagged as a "minor edit". A major edit is basically something that makes the entry worth relooking at for somebody who wants to watch the article rather closely, so any "real" change, even if it is a single word, is a major edit. This feature is important, because users can choose to hide minor edits in their view of the Recent Changes page, to keep the volume of edits down to a manageable level.
The reason for not allowing a user who is not logged in to mark an edit as minor is that vandalism could then be marked as a minor edit, in which case it would stay unnoticed longer. This limitation is another reason to log in.
The wiki markup
In the left column of the table below, you can see what effects are possible. In the right column, you can see how those effects were achieved. In other words, to make text look like it looks in the left column, type it in the format you see in the right column.
You may want to keep this page open in a separate browser window for reference. If you want to try out things without danger of doing any harm, you can do so in the Sandbox.
Sections, paragraphs, lists and lines
What it looks like
What you type
Start your sections with header lines:
Life is 10% what happens planned, so as to accept the one that is waiting for us. Only I can change my life. No one can do it for me. There isto you and 90% how you react to it. We must let go of the life we have only one happiness in this life, to love and be loved.
The server fills in the part after the | when you save the page. Next time you open the edit box you will see the expanded piped link. A preview interprets the abbreviated form correctly, but does not expand it yet in the edit box. Press Save and again Edit, and you will see the expanded version. The same applies for the following feature.
Automatically hide stuff in parentheses:
[[The Lord of the Rings (movies)|]].
In the URL all symbols must be among: A-Z a-z 0-9 ._\/~%-+&#?!=()@ \x80-\xFF. If a URL contains a different character it should be converted; for example, ^ has to be written %5E (to be looked up in ASCII).
Browsers render alternate text when not displaying an image -- for example, when the image isn't loaded, or in a text-only browser, or when spoken aloud. See Alternate text for images for help on choosing alternate text.
Plain wiki link categorizes the page under a certain category (see somewhere this page: you find a link to category "Wikiquote"). Clicking on a category link leads you to a category page, which you can also link directly in the page elsewhere to: Category:Categories
To include links to non-image uploads such as sounds, or to images shown as links instead of drawn on the page, use a "media" link.
The latter method of superscript can't be used in the most general context, but is preferred when possible (as with units of measurement) because most browsers have an easier time formatting lines with it.
ε0 = 8.85 × 10−12
C² / J m.
Superscript: x<sup>2</sup> or x²
8.85 × 10<sup>−12</sup>
C² / J m.
Suppressing interpretation of markup:
Link → (<i>to</i>) the [[Wikiquote:FAQ]]
Used to show literal data that would otherwise have special meaning.
Escapes all wiki markup, including that which looks like HTML tags.
Does not escape HTML character entities.
<nowiki>Link → (<i>to</i>)
Commenting page source: not shown in page
Used to leave comments in a page for future editors.
<!-- comment here -->
Placement of the Table of Contents (TOC)
At the current status of the wiki makup language, at least four headers automatically trigger the TOC in front of the first header (or after introductory sections). Adding __TOC__ anywhere in the page forces a TOC for pages with fewer than four headers. Putting __NOTOC__ anywhere forces the TOC to disappear.
HTML tables can be quite useful as well. For details on how to use them and discussion about when they are appropriate, see Wikipedia:How to use tables.