When Tabloid Extra (DMPAPER_TABLOID_EXTRA) is selected as the default paper size, drivers that are written by using UnidrvUI or PS5UI may show the paper size as 11.69 x 18. This value is inconsistent with industry standards as defined by the IEEE Working Group PWG 5101.1. These industry standards define Tabloid Extra as 12 x 18.
To work around this problem, do not use the form definition from UnidrvUI or from PS5UI. We recommend that you use a custom form or the form that was loaded into the forms database.
For more information about how to add forms to the forms database, see the following article on the MSDN website: