If you want to make the best use of 4D Chart, don't limit yourself to the 4D Chart Language Reference Manual. There are seven chapters of information about 4D Chart in the 4D User Manual:

Chapter 10: Graphs
Chapter 11: Modifying 4D Chart
Chapter 12: Choosing a Graph Type
Chapter 13: Creating a Graph
Chapter 14: Modifying Graph Features
Chapter 15: Adding Objects and Text
Chapter 16: Using Hot Links (skip this chapter)

Many of the fundamental aspects of using 4D Chart are not explained in the 4D Chart Language Reference Manual, because it is assummed you have already reviewed the 4D Chart basics in the 4D User Manual. Studying these chapters will give you a much better understanding of the capabilities of 4D Chart, which will enable you to make the best use of the 4D Chart programming commands.
You can download the "4D_V6_User_Reference.pdf" or "4D_v6.5_User_Reference.pdf" documents.