# Introduction

The `Zend_Pdf` component is a PDF (Portable Document Format) manipulation engine. It can load, create, modify and save documents. Thus it can help any PHP application dynamically create PDF documents by modifying existing documents or generating new ones from scratch.

`Zend_Pdf` offers the following features:

- Create a new document or load existing one. Loading PDF V1.4 (Acrobat 5) documents is now supported.

- Retrieve a specified revision of the document.

- Manipulate pages within a document. Change page order, add new pages, remove pages from a document.

- Different drawing primitives (lines, rectangles, polygons, circles, ellipses and sectors).

- Text drawing using any of the 14 standard (built-in) fonts or your own custom TrueType fonts.

- Rotations.

- Image drawing. JPG, PNG [Up to 8bit per channel+Alpha] and TIFF images are supported.

- Incremental PDF file update.