Windows
< 3 steps in all >
Click the [Paper] tab.
Select [Zoom] and click the [Settings] button.
From the pull-down menu, select the actual paper size to be used for printing.
Enter the percentage.
By clicking the button, you can specify the value in increments of 1%. In addition, select [Upper Left] or [Center] for the base point on the paper.

Macintosh
< 2 steps in all >
Select [Page Setup] from the [File] menu and enter the ratio (%).
In Mac OS 9, select [Page Setup] from the [File] menu and enter the ratio (%).
Click the [OK] button.