\textit \textrm $rm_g$ reprint, <- if comentout it, manuscript will be doublespaced.

mac tex http://tug.org/mactex/ with texpad

Igor Command ???=wavename make ???=???*3making wave Edit ???edit wave log [f(Hz)] \F'times'log [\F'Times New Roman Italic' f \F'Times'(Hz)] 1000/T(K^-1) Label bottom "\F'times new roman'1000/\F'times new roman italic'T\F'times' (K\S-1\M)" …

$ latexdiff old.tex new.tex > diff.tex