The .set section command defines the options for the section headings. This command must precede any .section commands.
.set section {options}
.ss
| n | Integer number of lines to skip. |
| b | Boldface. |
| i | Italics. |
| u | Underline. |
| s | Suppresses section numbers. |
The options are entered one after the other, and are not separated by commas or spaces. Any combination of options may be used. However, some printers do not accept a combination of boldface, italics, and underline.