Compuprint 4247-Z03 Programmer Manual - Manual (Page 167)

Positioning the Graphic Window in the Graphic Block Area
As mentioned previously, the graphic window can be any size within the graphic presentation space limits.
The graphic block area size can be the entire physical Medium or a portion of the physical medium.
The Write Graphics Control command, described in detail in “Write Graphics Control (WGC)” on page 148,
specifies the mapping of the graphic window to the graphic block area.
The term mapping refers to the transformation of an abstract space into its size and position on the
physical medium. There are three ways to map the abstract space. They are scale-to-fit, center-and-trim,
and position-and-trim mapping. These mapping methods are described in detail in “Area Mapping Control
Options” on page 153.
Figure 19. The Graphic Block Area on the Physical Medium
Chapter 4. IPDS Programming Information 147