Hi Hans, yesterday you told me about the image conversions in grph-con.lua, and I tried to find out how to use them. Up to know I only knew "mp" for SVG images. I found I can use "gray.pdf" or "cmyk.pdf" to convert an image (JPG or PNG) to grayscale/CMYK, but the resolution isn’t used for downsampling (of course, it’s not mentioned in the command template): \externalfigure[hacker][conversion={gray.pdf},resolution=72] I tried to write my own downsampling converter, but don’t understand how I can hook it into the list of converters: """ local downsample = sandbox.registerrunner { name = "downsample", program = "gm", template = [[convert -compress Zip -sampling-factor 1x1 -density %resolution%x%resolution% -resample %resolution%x%resolution% %oldname% %newname%]], checkers = checkers, defaults = defaults, } programs.downsample = { runner = downsample } """ (I’m not sure if I must calculate the desired pixel size beforehand.) -*-*- Apart from converters, there are several parameters of \externalfigure that I don’t understand and thus can’t document in the Wiki; a few are even not yet documented in the interface files: * equalwidth/equalheight * s/sx/sy * xmax/ymax * prefix, label, comment * bodyfont * mask * frames (≠ frame) * interaction, crossreference * resources * display * order * crop, transform * controls, preview: only related to video and thus obsolete? * hfactor/wfactor: When do these make sense? (I know factor) I accidentally learned that I can use parameters of \framed, but the inheritance from \setupframed is not explicit – some are mentioned, like backgroundcolor, others not, even if they work, like corner (but they don’t affect the image). Hraban