Thanks to both of you for the advice. I replaced the yellow cartridge with a new one and that did improve the image, the purple spots on the pine trees vanishing and a normal green color resulting there. The overall purple cast also largely vanished but now the image over the blue and white mountains and sky is faded but the greens are normal. I tried removing all of the cartridges and reinserting them with no improvement. I tried to re-install the drivers but couldn't find them yet - will look further today. I didn't really think it's part of this problem but since a monitor calibration was due anyway I did that using the Datacolor Spyder X with no improvement resulting.
I have to say that this much praised printer hasn't worked very well for me right from the beginning (I've had it about 9 months), even at the beginning the print quality for landscapes being sub-par, the quality from my quite old Pixma 922 all in one printer being better. This must surely be from my ineptitude and deficient knowledge concerning most things digital, being an old guy stuck in the film era and when a calculator was the most high tech device available!
Thanks again for the help. I'll keep working on it to best of my poor abilities.
Last edited by wanderer2; 03-11-2020 at 06:09 AM.
Reason: added info