Originally Posted by fbrII
However, margin adjustments are still not possible.
So the KT allows you to adjust the main body margins on the fly? I found that if I used a css the specified font size in pts then the font scaling ability is inhibited. Open a epub using the tweak epub feature, find the area of the css where calibre specified the body margins in pts and either change them to something like .3em or remove them and see if this changes how you KT handles margins.