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Ok, thanks Luigi. This is how I sorted it out, hope it may help someone. It looks like I should write a typescript and a symbol definition file, but I new to this and don't know how to do it yet. This is a workaround for the meantime: - Download the free True Type font "Zapf Dingbats BT" from http://www.ufonts.com/fonts/zapf-dingbats-bt.html - You should have got the file ufonts.com_zapf-dingbats-bt-2.ttf or an EXE file -an installer- - In windows 7 it may be installed by clicking "install" -context menu, right mouse click- - Generate Context font database: mtxrun --script fonts --reload - Check it's been read: mtxrun --script fonts --list --all --pattern=zapf* - You should have several lines like "zapfdingbatsbt zapfdingbatsitcbybtregular c:/windows/fonts/ufonts.com_zapf-dingbats-bt-2.ttf" - Finally this is how I get the characters I need: \definefont[zapfdingbats][ufonts.com_zapf-dingbats-bt-2.ttf at 10pt] \starttext Testing: {\zapfdingbats \char109} %shadowed white circle \stoptext