> The `Document` object is the starting point of your `.docx` journey, this is the literal Word Document. You add all your content such as `Paragraphs` to this `Document`, and at the end export it however you like.
Various parts of the API require positioning arguments. The units are "20ths of a point" from the [OOXML](http://officeopenxml.com/index.php) specification.
See [Lars Corneliussen's blog post](https://startbigthinksmall.wordpress.com/2010/01/04/points-inches-and-emus-measuring-units-in-office-open-xml/) for more information and how to convert units.