[pdurrant]

I have 4% horizontal margins, 13.5% top margin, 11.25% bottom margin, Font size 135%, font weight Regylar, Publisher Style On.

But I can't tell you what font - the font menu pops up and immediately disappears. Same for TOC, Bookmarks, Highlights, Night/Day, and stats. The setting menu is the only one out of that bottom bar that opens and stays open. I've emailed you a video.

I don't know which version this started happening with - since I set up the fonts, etc, I haven't had to go back and use them.

The first of your images (8/Z) matches what I'm seeing, but the drop cap should, I think, be over three lines. And the drop cap should be in a different colour to the text.

The other two look right in your images. It's the 2/U one that differs from my image. I suspect it's because of a different font. I might be using Hoeffler Text, if the font menu shows the current font at the top. (or top as displayed.)

Drop caps are tricky, as for good visual display they must depend on some measurements from the font being used.