Page Setup dialog box: Page tab (Report Editor & Hierarchy Editor)

On the Page tab, you can set the portrait or landscape orientation of your printout or scale your printout to fit on one page. You can also choose between the automatic page numbering feature or starting the pagination at a specific number.

Orientation: specifies either Portrait (that is, 8.5" wide by 11" high for letter-sized paper) or Landscape (that is, 11" wide by 8.5" high). The default is Portrait.
Page numbering: specifies the page numbering feature as automatic or starting the pagination at a specific number. The default is Automatic.
Scaling: sets how to scale the document:
Adjust to scales the document by the selected percent. Use it to increase or decrease the scale of the document. This setting is the default, with 100% (full size) selected.
Fit to page scales the document to the selected number of pages. You can set the number of pages wide, for horizontal scaling, and tall, for vertical scaling.

You can specify the measurement units (inches or centimeters) in the My Preferences dialog box.
Changing the Orientation alters the values for both Page Width and Page Height.
Fit to page ensures that the document fits within the parameters, but does not increase the size of the document. If the document is already smaller than the set width and height, it is not expanded.