Tab key navigation

You can also use the Tab key on your keyboard to move between links on a page. A single press of a Tab highlights the next link, while Shift+Tab highlights the previous link. The enter key will open the selected link

Cascading Style Sheets

This web based version of the resource uses cascading style sheets (CSS) for visual layout. Users can turn style sheets off or assign their own within their browser preferences. If your browser or browsing device does not support style sheets at all, the content of each page is still readable.

Text size and fonts

It uses only relative font sizes, compatible with the user-specified "text size" option in visual browsers. If you wish to increase the size at which the text is displayed, you can do this by simply adjusting the browser settings. The text size tool is available in the menu of different browsers as follows

  • Internet Explorer 5, 5.5, 6 (PC): View > Text size
  • Firefox, Netscape 8: View > Text size
  • Opera: View > Zoom Netscape 6, 7,
  • Mozilla: View > Text zoom
  • Mozilla: View > Text zoom
  • Safari (Mac): View > Make text bigger internet Explorer 5 (Mac): View > Text zoom


Many links have title attributes which describe the link in greater detail, unless the text of the link already fully describes the target (such as the headline of an article). Links are written to make sense out of context.

Accessibility standards - WAI compliance

This web version of the resource has been designed to conform to the WAI AAA rating where HTML is used. Where documents are made available in other formats, conformance has not been achieved.