Hello Karol,
thank you yery much, after setting JPEG buffer to 1 and the advanced settings in GUIX studio it works!
Then I tried to set "Input - Graphics screen1 input format" to CLUT8 and rebuild my project and it also works and it's nearly the same color quality!?
But now the best: when I have a look at the memory tab I saw that I saved up to 150 kByte RAM! Normaly I had expected to save 240x320 = 75 kByte by reducing the color from 16 bit to 8 bit, but now it seems like I've saved 16 bit per pixel. What's reason for that and is that possible at all?
Thank you and best regards
Ralph