At the time of printing the document setting change automatically…
You can set Default Print Format from Customize Form.
the settings are already done, but when i m converting the pdf to give command of print its automatic converts in A4 size paper.
ANY UPDATE PLZZZZZZZZZZZZZZZ.
Please click on Settings in this screen and select the page size you wish to use other than A4. Settings is just next to Print, on the right side.
Meanwhile, you should also check if these settings affect other documents such as Invoices.
But why not select the Page size in the PDF viewer in your browser ?