Question

Look at the proofreading symbol. ^ What does this symbol mean? move a word to the previous line insert a letter or word capitalize a letter or word delete a letter or word

Answer 1

Insert a letter. Just used the process of elimination. Underlining a letter three times is used to capitalize it in proofreading and to delete a letter or word you just cross it out. 

Answer 2

Insert a letter or word or in math numbers as well.