✔ 最佳答案
The procedure is really easy.
Suppose you are using the Standard Yahoo Mail and you want to adjust to the latest version. You can
1) From the top right hand corner, select "Options".
2) From "Options", select the last item "Switch to the newest Yahoo Mail"
After your confirmation, the template and outlook will be changed at once.
Oppositely, you can redo the above steps to return the original Standard Yahoo Mail by selecting "Switch to the Standard Yahoo Mail".
Hence, if you have changed the template accidentally and you want to return the original one, follow the procedures above. This is my own experience.
Hope I can help you.
參考: Mathematics Teacher Mr. Ip