To test a single diagram, copy it into test.m4 and type 'make tst'. The file is processed through m4 and dpic -g to make test.tex which is then included by tstpgf.tex. To produce examplespgf.pdf using tikz-pgf and pdflatex, type "make" To produce examplespgf.ps using tikz-pgf, latex, and dvips, type "make examplespgf.ps".