# Advanced guides

- [QR codes](https://docs.typeset.sh/advanced-guides/qr-codes.md)
- [Save handlers](https://docs.typeset.sh/advanced-guides/save-handlers.md): Manipulate your PDF documents after they have been rendered.
- [Error handling](https://docs.typeset.sh/advanced-guides/error-handling.md): Catch them all!
- [Signing a PDF](https://docs.typeset.sh/advanced-guides/signing-a-pdf.md)
- [PDF Standards](https://docs.typeset.sh/advanced-guides/pdf-standards.md)
- [ZUGFeRD](https://docs.typeset.sh/advanced-guides/pdf-standards/zugferd.md): Zentraler User Guide des Forums elektronische Rechnung Deutschland
- [PDF/A](https://docs.typeset.sh/advanced-guides/pdf-standards/pdf-a.md): PDF/A-1B (ISO 32000-1)
- [PDF/UA](https://docs.typeset.sh/advanced-guides/pdf-standards/pdf-ua.md): PDF/Universal Accessibility (ISO 14289)
- [PDF/X-4](https://docs.typeset.sh/advanced-guides/pdf-standards/pdf-x-4.md): Create print ready documents
- [Color profiles](https://docs.typeset.sh/advanced-guides/color-profiles.md): Separation / DeviceN color support
- [JavaScript](https://docs.typeset.sh/advanced-guides/javascript.md): This is an experimental feature and script tags may change in the future. However, please give it a try and feel free to provide feedback.
- [Common Object/Classes](https://docs.typeset.sh/advanced-guides/common-object-classes.md)
- [createPdf function](https://docs.typeset.sh/advanced-guides/common-object-classes/createpdf-function.md)
- [HtmlToPdf](https://docs.typeset.sh/advanced-guides/common-object-classes/htmltopdf.md)
- [Result Object](https://docs.typeset.sh/advanced-guides/common-object-classes/result-object.md)


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