Please write image files in a vector graphics format, when possible, and generate the .png and .pdf versions on the fly (see ../Makefile). Recommended tools are dia, tgif, and xfig. Store the .dia, .obj, or .fig versions in mercurial, but not the .png or .pdfs. If the figure is not available in a vector graphics format, store a .png and a .pdf version here. If you add a source (.dia, .obj) file here, remember to add it to the list of figure sources in the Makefile in the directory above Note: tgif can convert from .obj to .pdf, but the pdf that results takes up a whole page. Instead, we convert to an intermediate .eps step, and then run epstopdf.