There are two types of graphics output in the OS/2 operating system:

• Retained graphics, which are stored in segments and can be redrawn or edited when necessary

• Nonretained graphics, which are drawn immediately but not stored and therefore cannot be used again without repeating the graphics functions needed to re-create the picture

This chapter describes the advantages of using retained graphics and provides information on creating and drawing retained graphics.

The following topics are related to the information in this chapter:

• Presentation spaces and device contexts 
  Coordinate spaces and transformations
  
  Editing retained graphics and graphics segments

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