回複：怎末樣編輯及打印信封？ 需要特殊的軟件嗎？

NO, you don't need any special software, just use word, first in [File] select [page setup],[paper] select [custom size], then select the size of your letter envelope, write the addresss of receiver and sender.
when print, put the envelope like paper, it is ok. of cause, you will try seveal times to make it works, I have tried it before, good luck.