What proofreading mark would you use to switch the order of words?

The proofreading mark for switching the order of words is a pair of arrows pointing in opposite directions.

Here's how it looks:

⬌

You would place this mark between the words you want to switch, like this:

The cat sat on the mat. ⬌

This would indicate to the writer that the sentence should be changed to:

The mat sat on the cat.

Let me know if you have any other proofreading mark questions!