Brother DCP-8025D - Manual (Page 108)

PRINTER DRIVER SETTINGS 7 - 14
Accessories tab
The Accessories Tab includes the settings for configuring the
printer driver for the size of paper loaded in each paper source. This
tab also installs any additional options into the driver settings.
Paper Source Setting
To configure the paper size for each paper source, highlight the
source in the Paper Source Setting list. Select the Paper Size from
the pull-down box and click Update. When Auto Select (default
Paper Source) is set in the Basic tab of the printer driver (See Basic
tab on page 7-2), the printer driver will automatically use the Paper
Source Setting to select a tray which matches the Paper Size
setting in the printer driver.
Default Source
The Default Source allows you to choose the paper source that will
be used when the paper size of the document being sent does not
match the Paper Source settings.