you cant control which default font size your readers will choose. My sony T3 has I think 8 settings. I use the default which is the 2nd smallest, but I could set any of the other sizes as my own default if I so chose, & that would over-ride what you put in your book.
most makes of e-reader have similar user options for font sizes
Maybe you should spilt your info into 2 pages and not fuss.
personally I hate seeing images that I cannot scale, within e-books
|