This seems like a really stupid question, but I am confused. I am LaTeX-ing papers for a professor, but APS requires the REVTeX format. Is it as simple as \documentclass{revtex4-1}, and remains as a .tex file?
Are there formatting requirements (for APS/AIP) I should look out for as well? I don't like how the sections are numbered with Roman numerals, but is that one of those things that are required?
\documentclass[aip,apl,reprint,article,floatfix]{revtex4-1}. If you set the correct options, then 99% of the time when you get to something you don't like, you just ignore it and move on. I can strongly recommend against using revtex for anything except submissions to journals which require it. Also note that many of these journals (and many more besides) have some rather strict requirements eg. on .bib files. – Chris H Mar 17 '14 at 14:51