It appears to me that the manual has a mistake and that IBIS high resolution remains enabled when the power is turned off and back on, but I have tried it only once.
Take the picture.
The above is very helpful. I don't have ibis and have been looking for more info on the feature. I knew output was JPEG. I should have looked for an updated manual. Thanks for posting this.
Bay Area - CA
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More information and apparent manual errors.
More general information: https://en.wikipedia.org/wiki/Pixel_shift
My wish list is for Canon to save the nine raw images as CR3 files and update DPP to include the algorithm for combining them. Next, adjust the sensor movement so that an IBIS high res image might be made with image stabilization, or at least with the optical stabilization of the lens. Some other camera manufacturers seem to provide programs for combining the images later on a computer and are able to make the feature usable hand held.
IBIS high res mode appears to work in 1.6x crop mode, but I do not see that in the manual. IBIS high res mode is disabled when DPRAW is enabled, but I do not notice that in the manual.
I am guessing that it might work especially well for photographing small objects in a light box where nothing is moving and the scene lighting is completely controlled.
I can see the IBIS high res mode helpful when photographing a distant small perched bird in 1.6x crop mode if I were carrying a tripod.
09/26/2023: New firmware updates are available.
08/18/2023: Canon EOS R5 C training series is released.
07/31/2023: New firmware updates are available.
05/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
03/30/2023: New firmware updates are available.