Hi, if i give cupsBitsPerColor=8,i will get cupsBitsPerPixel=8. That means whether Y color bits of a pixel is 8,M color bit is 8,C color bit is 8,K color bit is 8 or a combination of YMC color bit is 8. If i change the cupsBitsPerColor any difference will come to the cupsBytesPerLine header information and how it is coming? Please reply. regards, Shermin