If I change the width of an included image, the 75% and 100% choices both give me the same result. See video
Would it be possible to send us that notes exported as an Agenda file?
Actually I think I understand what is going on – the image already shows at its original size at 75%, so it cannot grow any larger.
If you include a very small image for instance, the width% selection has no effect on the display.
As a user I’m not sure what I would expect to happen in such cases – switching from 75% to 100% and seeing no change is intuitively surprising. Maybe make the too-large choices unselectable?