I have a visual impairment requiring that I read somewhat large print. Also, I read on an iPhone, so screen space is limited. It is therefore important to me that the margins be as small as possible. Ideally, they'd be nonexistent.
In M2, I was able to make the vertical margins be just a few pixels (or thereabouts) wide. In M3, this is not possible, even with those margins set to Narrow. As a result, I lose an entire line of text on each page. In M2 I had seven lines, while in M3 I have only six with the font size and line spacing the same.
I request that there be an option to set the vertical margins to None. If that's not pssoble (which I believe is the case), how about Negilgible?