[GRASS-dev] Display library documentation?

[Vaclav Petras]

Hi,

is there some documentation on how to use the display library, i.e. how to
write a d.* module? I've tried reading d.vect code but I miss the general
rules and concepts like how to set color or which coordinates should be
used when as well as information which functions should be used in which
case like what is the difference between D_symbol and D_symbol2.

Thanks,
Vaclav
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