Using Layouts to Set Up a Print - AutoCAD 2011 and AutoCAD LT 2011: No Experience Required - page 718

FiGuRE 14.18 The Page Setup Manager dialog box (top) and the Page
Setup dialog box (bottom)
To open the Plotter Configuration Editor dialog box (see Figure 14.19),
click the Properties button next to the Name drop-down list. Click
the Device And Document Settings tab. In the upper group, highlight
Modify Standard Paper Sizes (Printable Area). In the Modify Standard