Line numbering puts line numbers in the margin. The line numbers are displayed on screen and are printed.
Click Tools > Line Numbering and select the Show numbering checkbox in the top left corner. Then click OK.
Figure 68 shows an example with numbering on every line.
You can choose how many lines are numbered (for example, every line or every tenth line), the numbering type and whether numbers restart on each page. In addition, a text separator (any text you choose) can be set on a different numbering scheme (one every 12 lines, for example). See Figure 69.