Didn't run through all these posts but I come across this problem all the time and thus give up trying to use it.
Does everyone's font sizes modification work properly?
After I changed those default font sizes, some of the them will not be applied when reading a book. For example, choosing 15 will give me the same font size as 16. And some other font sizes also won't work. Is it just me or is there anybody else? How can I solve this problem?