If you click on the name of the page, !-FitNesse-! will print a list of every page that references that page. Try it by clicking on !-WhereUsed-! above.
Use alt+s (Windows) or control+s (Mac OS X) to save your changes. Or, tab from the text area to the "Save" button!
Grab the lower-right corner of the text area to increase its size (works with some browsers).