Order new ink so that new cartridges arrive before existing ones run out.
I probably explained my self incorrectly. I don't plan on changing cartridges before they are empty. What I want to know is, at what point does the printer warn me that the ink is running low, so I can order new ink. I want to order them as late as possible, without running dry before they arrive. Since I have a photo studio, I print about 20 A4 pages a day (since Canon did not yet manage to send out an technician to fix my roll paper unit )
Kind regards, Marco...