Waveshare e-paper displays with SPI

Hi @ZinggJM

I'm using display GDEW075Z08 with red and trying to use the grayscale and i see that command is not executed
display.setTextColor(GxEPD_DARKGREY);
as the library doesn't support the grayscale for this display..
meanwhile i can see there's in the documentation some ideas about how to implement it but I'm not sure if the documentation is just a copy paste from other display that has grayscale!
till this moment I'm not sure if it's doable or not ..
I also noticed while showing red pixels the screen somehow show the light and then dark grey before it settles in red..

some guidance from you would be appreciated ...

Thanks in advance!