This is a wiki, so anyone can edit any unprotected page. Any changes you make will appear immediately.
To edit a page, simply click on the "edit this page" tab at the top of any page. This will bring up a page with a text box containing the wiki text of the page you were looking at. Make the changes you want and write a short summary of the changes in the "Edit summary" box below the text box. When you have finished, press the "Show preview" button to see how your changes will look. Once you are happy with your changes, press the "Save page" button. Your changes will be saved and will immediately be visible to all users of this wiki.
To help you format your edits, there are some buttons over the text box. If you hover your mouse over a button, a short message should appear telling you what the button does. You can stop these buttons from appearing by changing your preferences.
You should sign any edits you make to talk pages by typing ~~~~ after your comments. You should not sign your contributions to other pages apart from some Wiki pages used for discussions. Your changes will be tracked in the page history.
Any edit which alters the sense of the article is a major edit. Before making significant changes to a page, it may be advisable to click on the "discussion" tab to see comments made by other users. You can leave a note here letting people know what you plan to do, giving them a chance to respond before you actually make the changes. This approach helps to avoid edit wars, with users reversing each others' edits. It is recommended for all users but particularly for new users.
If you are logged in, you will see a box labelled "This is a minor edit" just above the buttons. Check this box if you are only making superficial changes to the page such as correcting spelling, tidying up the format, etc. Flagging an edit as "minor" indicates to other users that you believe your changes do not need to be reviewed and would not give rise to any dispute.