The "Ink Model Number" button will display the compatible cartridges for the printer so you have quick access to the model numbers when the ink needs replacing. It is not able to display the specific model cartridges you have in the unit. Please note, the printer is supported only with the PG-240 and the CL-241, so if you are using genuine Canon ink, that is the model ink you have inserted. The only difference with the "XL" and the "XXL" models are the amount of ink in the cartridge.
OK, thanks. that answers my question, literally.
The low ink warning was not very accurate with the original 240 cartridge. I was able to continue printing for several weeks. Then I installed a new 240XL cartridge but got no feedback from the printer -- zilch, nada! I was/am left in total uncertainty, not knowing the status of the cartridge nor the printer. It is apparently printing OK now, but I am still left in limbo, waiting and wondering what will happen. Why doesn't it tell me something, some kind of feedback, in response to installing a new cartridge?
07/31/2023: New firmware updates are available.
05/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
04/20/2023: New firmware version 1.4.1 is available for EOS R3
03/30/2023: New firmware updates are available.
2/07/2023: New product announcements!EOS R8 EOS R50RF-S55-210mm F5-7.1 IS STMRF24-50mm F4.5-6.3 IS STMRF15-30mm F4.5-6.3 IS STM