Track changes in latex

To track changes in latex, we will use the following perl script latexdiff

To compare two documents simply run latexdiff in the command line like so:

latexdiff draft.tex revision.tex > diff.tex

where draft.tex and revision.tex are original and changed versions of your document, and diff.tex is where the markup is stored. The above command provides latexdiff with the two comparison files and the filename for the resulting marked .tex file. If the two input files you provide are valid .tex files, the resulting diff.tex will also be a .tex file. This marked file can now be compiled with your choice of TeX compiler (pdfLaTeX etc.).