It is really interesting and could keep me busy for hours. It is really interesting and could keep me busy for hours. This has an advantage in that you don't have to worry about making everything look properly formatted within the source. Here is even more text. The line above is a groff command, identified by the period in the first column of the line.
Most groff commands are on a line by themselves, although a few can be embedded anywhere on a line.
These commands are usually prefaced by a backslash, much as the shell uses the backslash as an escape character. Although there will be times when you want to use embedded commands, the majority are the commands on a single line, starting with a period. The groff language has a few commands for controlling the way characters look when printed or displayed. These include changing the size and line spacing of characters, as well as controlling fonts. Sizes and Line Spacing Character size and line spacing are not usually useful when displaying text on-screen, unless you are using a bitmapped terminal.