For a while, I've been using graphic chapter heads (i.e. graphic images of chapter titles in a specific font, rather than trying to embed the font into the epub file), however the best I can do as far as adjusting the size is to "width=75%".
Yet, when I submit my source document to Amazon, they manage to shrink the image to the specified size, regardless to the dpi. How do I do this (specify the image dimensions in inches) in html? This is an issue because, on a phone, the title will be tiny (75% of a phone width isn't much) while on a desktop it'll be HUGE (75% of a 28" monitor).
For the first time I'm trying the same thing with B/W images, so I need to really clean up the code for these images!
Update: I tried using "in;" (not accepted) and both "cm;" and "mm;" but it seems to translate both into "pixels".