Hi Pablo and Wolfgang,
Many thanks ! The issue concerning a logo image in a TwoColumns document is resolved. It was only a matter of file format. I thought (I don't know why), that ConTeXt use SVG format. I've converted all my *.svg file in PNG and it works fine. Thank you very much for your help.
JP
LuaTeX can only use images in the formats PDF, PNG, JPG, JP2 or JBIG214. August 2016 um 16:13About the image on the top right of the TwoColumns doc : it works with mill.png image (but not with spider). I guess the 'Logo.svg' is too heavy (or something like that).
. Graphics which are provided in another format have to be converted in one mentioned before, for some formats (e.g. SVG) ConTeXt is able to convert them on the fly but you need the required programs (e.g. Inkscape for the conversion of SVG to PDF) on your system.
Wolfgang
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