This is just an example of how to print all pdf templates of a module (Contacts) landscape instead of portrait.

sugarpdf.pdfmanager.php

<?php

// Enrico Simonetti
// enricosimonetti.com
//
// 2017-06-19 on Sugar 7.9.0.0
// filename: custom/modules/Contacts/sugarpdf/sugarpdf.pdfmanager.php
//
// This is just an example of how to print all pdf templates of a module (Contacts) landscape instead of portrait.
// After this customisation is installed, and the system is repaired, all PDF templates for Contacts will be printed landscape instead of portrait

require_once('include/Sugarpdf/sugarpdf/sugarpdf.pdfmanager.php');

class ContactsSugarpdfPdfmanager extends SugarpdfPdfmanager
{
    public function preDisplay()
    {
        parent::preDisplay();
        $this->setPageFormat(PDF_PAGE_FORMAT, 'L');
    }
}