The page space is where a complete picture is assembled for viewing on a display screen, or for printing or plotting on a piece of paper. Page coordinate units can be increments of an inch, a meter, pels, or some arbitrary value. An application uses GpiCreatePS to specify the units used for page coordinates.
If the application uses retained-drawing mode, the picture in page space contains parts of models (or pictures) from each of the model spaces that have not been clipped. The picture also contains any additional unclipped graphics-primitive output that the application generated in nonretained-drawing mode. If the application uses nonretained-drawing mode, the picture in page space contains all the graphics-primitive output that has not been clipped.
In the page space, an application can use a rectangular clipping area called a graphics field to define the part of the page space to place in the next coordinate space (the device space). The coordinates that define the location and dimensions of the graphics field are always page coordinates.
The page space contains the presentation page whose size and units are defined when creating the presentation space with GpiCreatePS. The presentation page is a rectangle in page space.