```php // Change the title of the generated (merged) PDF // This method accepts a free text that can accept the following placeholders: // - %1$s .... contains the invoice number (is extracted from the XML data) // - %2$s .... contains the type of XML document, such as ‘Invoice’ (is extracted from the XML data) // - %3$s .... contains the name of the seller (extracted from the XML data) // - %4$s .... contains the invoice date (extracted from the XML data) // The follwing example will generate: Lieferant GmbH : Invoice R-2024/00001 $zugferdDocumentPdfBuilder = ZugferdDocumentPdfBuilder::fromPdfFile($zugferdDocumentBuilder, '/tmp/existingprintlayout.pdf'); $zugferdDocumentPdfBuilder->setTitleTemplate('%3$s : %2$s %1$s'); $zugferdDocumentPdfBuilder->generateDocument(); $zugferdDocumentPdfBuilder->saveDocument('/tmp/merged.pdf'); ```
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