Create the layout (activateLayout)
First create a new Page Viewport (makeNewPage).
First finish the current page (finishPage).
Then create the new page viewport (createPage).
First get the page master (getSimplePageMasterToUse, pageSequence.getPageSequenceMaster or pageSequence.getSimplePageMaster).
Then get the body (currentSimplePageMaster.getRegion, from currentSimplePageMaster's regions map).
Then create the page viewport (createPageAreas(currentSimplePageMaster)).
From the properties of the page master create the page reference rectangle, a new page, a new FODimension object, and a CTM object.
For each region in the page master (in our example we only have a body):
make a region viewport (makeRegionViewport), which involves calculating the position of the region on the page, using the FODimension and CTM objects.
make the reference area (makeRegionBodyReferenceArea, makeRegionReferenceArea).
At this point the page viewport and its region viewports have been laid out.
At this point the body has a single span area with a single flow area without children.