This Encyclopaedia contains information about all PIL commands, alphabetically arranged. Information in the following PHENC entries is also of relevance.
The way in which PIL is used in practice is best seen by inspection of files in the PHOENICS Input Library. The use of the "search" facility of the PHOENICS Commander makes it easy to find examples.
A library case which is especially rich in use of advanced PIL is case 20, which is not a complete Q1 itself but which, when LOADed into a Q1 file, will provide a plain-English interpretation of the data-setting commands.