If it is possible to allow separate font sizes to be
specified for the normal and fixed width fonts, this
feature would be very handy. On my system, using
normal font Arial and fixed-width font Courier, font
size 10 makes for nice Arial output, but Courier
becomes nigh unreadable. Upping that to 11 (12,
really, as Arial has no 11), Courier becomes readable
and Arial is too large and bold.
I am not sure if it is possible to have multiple font
sizes for different fonts in a single document page,
but if so, this would be very handy.