I'm sure this is a newbie question, but I can't figure this out. I have tried to follow the advice here: http://en.wikibooks.org/wiki/LaTeX/Fonts and here: http://www.cl.cam.ac.uk/~rf10/pstex/latexcommands.htm
But I can not seem to be able to generate any font change. I either get no change or error messages.
Here is the output of one failed attempt to change the font to Times using this command:
Apparently I either don't have a correct package installed or...
The output says " Metric (TFM) file not found." but I am not sure where to go from there.