unfortunately the screenshot is gone but nevertheless, did you manage to shrink the image this way?
I’m also looking for a possibility to shrink the images for backup purposes.
I tried shrinking the main partition within the image, but when rebuilding the image on an SD, the boot
cma: cma_alloc: alloc failed, req-size:2025 pages, ret: -12
Of course it would be nice if m2p would come with a backup plugin, but I understand it is a lot of work
and as far as it’s concerning me, I’m fine with manually editing the image but then it should work in the end.
I also played with the piCorePlayer image. The resizing of that image works as expected.
I think at least a short „how-to“ should be available for m2p.