Answer:
When editing your draft, in order to visualize the length of the sentence, it is useful to underline every sentence from the beginning to the punctuation mark.
Then to take away the marks, highlight the whole document and click the "underline button".
Step-by-step explanation:
Underlying, just like the use of bold text, italics and quotation marks, help to give prominence to something, to highlight its relevance or simply to bring out attention to unusual names, foreign words, tittles of literary or artistic works that complement and enrich the meaning of what's being expressed or the idea the writer is willing to convey.