Which proofreading mark would you use to insert a missing letter word or punctuation mark?

The proofreading mark for inserting a missing letter, word, or punctuation mark is a caret (^).

Here's how you would use it:

* Missing letter: The sentence is incomplet^e.

* Missing word: The cat sat on the ^mat.

* Missing punctuation: He asked me, "What is your name^?"

Let me know if you have any other proofreading questions!