I have an essay, roughly 1000 Chinese words. I want to add phonetic guide (Pin Yin) on top of each Chinese words.

Therefore, in MS Word, I use Phonetic Guide. However, Phonetic Guide only allows me to create pin yin for 20 to 30 words each time. I try to look for a function which allows me to add phonetic guides for all the texts at once, but I cannot find an answer online.

I also want to make the phonetic guide font bigger and create more space between the Chinese text and the Pin Yin.

Any expert can give me some lights? Thank you very very much!