ClickFile
menu Plotter 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, select a paper size from the list.
Click Edit.
In the Custom Paper Size wizard, make changes to the paper
size, printable area, custom paper size name, and source.
Click Finish to exit the Custom Paper Size wizard.