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If file size does not matter, the best solution is arguably to upsample the image, for example using ImageMagick: convert small.png -filter point -scale 10000% large.png You can install ImageMagick on macOS using Homebrew: brew install imagemagick You can also use batch processing in the current directory using a loop like this: for f in *.png: ...


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If you are using dvipdfm you will have to add the suitable driver information to all packages as normally dvips is assumed. So try something like \PassOptionsToPackage{dvipdfmx}{graphicx} %or dvipdfm depending on the tex system \documentclass[review]{elsarticle} \usepackage[dvipdfm]{hyperref}



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