The "Quick Reply" feature for posting does not have option fields for changing font size,but it can be done,just type the fields in the Quick Reply window.
and then type your message in the space between fields,just like you would if you were using the "Advanced" field. I used size 2,3,4 and 5 here,use what ever size you want,and don't worry about message length as the space will expand with the message,just tried it in 2nd. post down,it worked.
