@Section
   @Title { PDF (Adobe Portable Document Format) documents }
   @Tag { pdf }
@Begin
@PP
You can get Lout to produce PDF (Adobe Portable Document Format) output as
an alternative to PostScript, by adding @Code "-PDF" to the command line
like this:
pdf. @Index { PDF documents }
@ID @Code "lout -PDF simple > simple.pdf"
No other changes are required.
@PP
The PDF output is superior to PostScript in providing links:  when viewed
with a PDF viewer, entries in tables of contents and indexes can be
clicked on and this transports the viewer to the part of the document
referenced by the link.  (Recent versions of PostScript support this
feature too, but Lout's PostScript doesn't.)  However, the PDF output
produced by Lout is inferior at graphics:  the advanced features of the
@Code "@Diag" and @Code "@Graph" packages do not produce any output.  One
can still format documents that contain them, but the results are disappointing.
@End @Section