Line numbering puts automatic line numbers in the margin. The use of line numbers make it easier to identify specific locations in the document. The most common method of assigning numbers to lines is to assign every line a unique number, starting at 1 for the first line, and incrementing by 1 for each successive line.
To apply line numbering:
Click Tools → Line Numbering and select the Show numbering option in the top left comer. Then click OK.
