slide width

[jason]

do u know the method to get the width of one slide

The width is a presentation wide setting, defined in MainPresentationPart.

Use MainPresentationPart's getJaxbElement().getSldSz().getCx()

To set it, src/pptx4j/java/org/pptx4j/model/SlideSizesWellKnown.java is in current svn

PresentationMLPackage now has a createPackage method which takes that as an argument.