Increase Chinese Text Size In Pinyin Language Selection?

Hi, all,

I use the Pinyin language input on my Mac computers running Lion. When you enter the pinyin--in any application text entry--Lion adds a drop-down text box with the Chinese characters that offer a match to the pinyin. But those characters are way too small for my eyes! How do I increase the size of the Chinese characters in the drop-down text box that appear below my pinyin text?

Thanks!