There are several options for defining the extent of the page area to be regarded as valid. Select Page extent from the 'View' menu then choose one of these sub-options
|Printable area The area available for printing on a standard HP printer i.e. leaving an unprintable border, 1/6" wide, on all four edges of the paper.
|Paper size The full size of the specified paper.
|Unlimited Not restricted to a paper size.