Hi all, ./compile.sh can be passed a parameter to compile only a specific file rather than the whole book. Now I consider this probably only occurs during development with a human executing the script (rather than some CI process which will be processing the whole book) and I'm finding it useful to automatically fire off a PDF Viewer on the generated file, as per the line below tagged "ADDED". if [[ $# -eq 1 ]]; then dir=$(dirname "$1") # e.g., Zinc pier_file=$(basename "$1") # e.g., Zinc.pier pillar_one "$1" produce_pdf "${dir}" "${pier_file}" open "${dir}"/"${pier_file}".pdf # <----ADDED else pillar_all compile_chapters compile_latex_book fi Is this something others would find useful? or can you see issues with it? Having this mod makes my working area dirty, and 'git clean' blows it away - so I'd like to integrate something like it. Now the above works for me on OSX, but for flexibility to deal with other platforms, the "open" command could be replaced with an environment variable, and do nothing if environment variable does not exist. What do you think? cheers -ben