TheWikiWay:Edit
It's Easy
The edit function can be found in each section of a wiki page. Once you are logged in, clicking on 'edit' will bring you to edit mode with a window displaying the wiki text for that particular section of the article (or the whole article if you clicked the edit link at the top of the page). You can add, delete, or change text within this window and select 'Show preview' to preview changes, 'Show changes' to show the "before and after" versions, or simply jump to 'Save page'. After previewing, remember to click the save button, otherwise any edits you made will be lost!
Next to these buttons is an Editing Help link that will show you more about basic wiki formatting.
Video on Editing