It is impossible to enlarge a word in qq personalized signature. Because qq does not have the function of opening a word separately to enlarge a word. So you can't enlarge a word. Qq personalized signature is a function extended from Tencent QQ chat software, which was launched by Tencent in 2005. There is a column of personalized signature in QQ personal file. You can set your own unique personalized signature according to your hobbies and mood.