You know, the desk computer I am now using here in the States is a self-built one, made of various component parts that my son bought from ware stores two years ago, he installed the computer, migrated the data from my laptop, and also downloaded some useful applications for me.

Everything is just fine, except that English-only keyboard. 

Sometimes I have to hunt and peck the alphabets of Zhuyin to type Chinese; without Zhuyin I can do nothing simply because I cannot touch-type the alphabets.  So this time my son downloaded the language switch function for me to type Chinese, still I need a muti-functional keyboard to do with it.  How to solve the problem?  Buy a new keyboard?  Not necessary.  He immediately ordered from Amazon a set of muti-purposed label which consists of three typing choices: English characters, Zhuyin alphabets, and 倉頡 words. 

I peeled off the labels and pasted them onto the corresponding places of theirs.  It works!