how now to set ibus (Intelligent Pinyin) font.

[home user]

Good morning,

I'm trying to enter Chinese characters using ibus (Intelligent Pinyin). 
As I enter the pinyin spelling, the Chinese characters show up in small 
menu.  The characters are displayed in a small font that my old eyes 
have trouble reading.  I want them to display in a size 16 kai font (AR 
PL Ukai CN).  I ran ibus-setup, and it is set correctly.  I also have 
the file ~/.i18n which has this line:
export FC_LANG=en-US:zh-CN
What else do I need to do?

thanks,
Bill.