A quick interlude into fonts

Dealing with fonts in LaTeX is one of the hardest aspects of using it. Fortunately, if one does not want to use Knuth's Computer Modern fonts, there is a very simple way to change font families. Full details are here, but for a publication that requires a Times roman typeface, one should use

\usepackage{mathptmx}
\usepackage[scaled=.92]{helvet}
\usepackage{courier}

which causes the roman and math fonts to be Times, the sans serif fonts to be in Helvetica—scaled so that it matches the other fonts better—and courier for the typewriter family. These three look nice together. In addition, output font encoding can be changed to T1 with

\usepackage[T1]{fontenc}

which is recommended. For more details see the above link