To add a new custom paper size starting
from an existing paper size
Click Output
tabPlot
panelPlotter
Manager. At the command prompt,
enter plottermanager.
In the Plotter Manager, double-click
the plotter configuration (PC3) file you want to edit.
In the Plotter Configuration Editor,
Device and Document Settings tab, double-click User-Defined Paper
Sizes & Calibration to display the calibration and paper size
settings.
Select Custom Paper Sizes.
Under Custom Paper Sizes, click Add.
In the Custom Paper Size wizard, Begin
page, select Use Existing.
In the list of existing standard paper
sizes, select a paper size on which to base the custom paper size
you are creating.