When selecting grayscale printing in the printer driver, does this use only the black ink or all the ink cartridges to produce the grayscale image?

Why do the color ink cartridges run out of ink even though I never or rarely print in color?

Is there a way to view how much ink is remaining?

Is there any way to reduce Ink consumption when printing from my computer?

Replace Ink

The ink cartridges run out very quickly. Is there any reason for that?

Why does my machine's LCD show "NO CARTRIDGE" even though I have already installed all the ink cartridges?