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1.6.2 The DOC_LIBRARY Command

When in IDL, the additional documentation for a program can be viewed at your terminal using the procedure DOC_LIBRARY. To view documentation for a given procedure:
Note that the procedure name must be enclosed in quotes to indicate to IDL that the name is a string. For example, to view the documentation of the procedure IUESPEC, type DOC_LIBRARY,'IUESPEC'.