CHAPTER 9 HP-GL - 2 
CONTENTS 
1.  COMMAND LIST .................................................................................................................. 3  
2.  INTRODUCTION .................................................................................................................. 4  
2.1.  HP-GL Syntax .......................................................................................................................... 4 
2.2.  Font Selection .......................................................................................................................... 4 
2.3.  Coordinate System and Printing Area ...................................................................................... 4 
2.3.1.  Coordinate system .................................................................................................................................. 4 
2.3.2.  Printing area ............................................................................................................................................ 5 
3.  COMMANDS ........................................................................................................................ 6 
3.1.  Initialization and Default Setting Instructions ........................................................................... 6 
3.2.  Plot Area and Unit Setting Instructions .................................................................................... 7 
3.3.  Pen Control and Plot Instructions ............................................................................................ 8 
3.4.  The polygon Group ................................................................................................................ 13 
3.5.  Plot Function Instructions ....................................................................................................... 18 
3.6.  Character Plot Instructions ..................................................................................................... 20 
3.7.  Dual Context Extensions ........................................................................................................ 26 
4.  INDEX ................................................................................................................................. 27