I'm at a loss about how to propose a tag synonym.

The FAQs do a good job explaining **what** a tag synonym is, who can propose it and who can vote it.

> Users with this privilege and a total answer score (total upvotes minus total downvotes) of 5 or more on the tag, can suggest tag synonyms. Users with a total answer score of 5 or more on the tag, can vote for tag synonyms.

This post[What are tag synonyms and merged tags? How do they work?](https://meta.stackexchange.com/questions/70710) also clearly explains **what** tag synonyms are. 

Now, I understand what synonyms are, but I don't understand **how I can practically operate the UI to propose one**.

By digging in the comments (not conspicuous!) of the linked post, and some other similar questions in here and on Meta Stack Overflow, I saw tips about clicking on the tag I want to create the synonym **for**. 

English not being my first language, I have no idea what that means. I need to make a concrete example. Let's make an example from Chinese.SE, where I have more than 2500 rep:

I have [tag:finals] and [tag:pinyin]. Let's say I want to suggest a synonym that results in [tag:finals] being remapped to [tag:pinyin]. In other words, the tag [tag:finals] will appear as having 0 questions; if I attempt to type [tag:finals] in the tag bar, [tag:pinyin] will show up instead. 

In the UI I can navigate to a url like `https://chinese.stackexchange.com/tags/finals/synonyms`, and the page looks like the pic below.

The label of the input field reads:

> *Suggest a [finals] synonym*.

This language is not clear enough for me.

**If I write "pinyin" in that input field right there, will the outcome be to remap [finals] to [pinyin], or should I go the other way around?**
 
Thanks

[![enter image description here][1]][1]

  [1]: https://i.sstatic.net/Mc9cP.png