Each page has an "edit" and "attach" tab on the right-top corner for editing the page and attaching documents (doc, pdf, ps, excel, ...). Do not use "WYSIWYG".
To insert a link to a document.
Attach the document with a check on the "create a link" option,
Edit the page, at the end of the file, the link is available, cut it and paste to where you need is.
Edition, keep it simple ... just write... identify your comment by adding your WikiName (paste and glue, the sentence just below the edition window) ... see from the examples some useful formatting (list, chapter, ...). See the "Show help" just above the editing window on the left for formatting rules
"Save quiet" for minor corrections, "Save" send a mail presenting the modification to a list of people. (see WebNotify on the first page of each WebSite ).
New topic (= new page) Any word starting with a uppercase (U) character followed by lowercases (l), then by an uppercase (U) is a WikiWord, like UlU , UllU , UlllllllUllllll . When written for the first time it is followed by a small blue ? . if you click on "?" you create a new topic.