> > added to -Tps later on, using the standard AGL name `uni21D5'. > [...] include this and the other 4 characters into groff in > general for all devices. How can this be done?
I don't think that the standard PostScript Symbol font contains \[vA], so in general it won't be possible unless you provide your own fonts. But you can approximate it by overprinting arrowdblup (\[uA]) and arrowdbldown (\[dA]).