Interesting... it looks like to possibility for several colors is already there in
booxsdk/code/src/ui/sketch_actions.cpp:249
but disabled in the version in the firmware.
Any chance that they would re-enable these options (and replace the colors with (white,black,red,green,blue))?
(From my point of view: nevermind that they may look alike on the grayscale display - but even that could be remedied by carefully selecting color variants of different brightness)
IMHO, it would be a cheap modification that would be very useful. (actually one of the three features I really miss more and more
)
(the others are the upcoming column zoom, and the (panning) hide/show margin functionality in hide-margin zoom)