4.5.6 Underline
Underlining is printing feature, not a font attribute.
You can underline in two ways: as a print feature, or with the – underline character. If you backspace and use the underline character, however, you often find the underline doesn’t come out the same length as your text.
The underline command works better. When you turn on the underline feature this way, the printer will underline all subsequent printable charac- ters, including spaces.
Send this command to turn on the underlining mode:
<ESC> &d n D |
|
in which for n you put | O(zero) to get fixed underline, |
| or 3 to get floating underline. |
And send this command to turn off the underline mode:
<ESC> &d@
4.5.7 How to print Escape sequences and control codes
You use both Escape sequences and control codes to print. So how do you print Escape sequences and control codes?
But you actually can print commands, and in two different ways. You would do this when you want to see everything exactly as it is sent to the printer— for example, to debug a string of text and commands that doesn’t print the way you think it should.
The Transparent print command prints the string of data that follows it without paying attention to any embedded Escape sequences or control codes. Transparent print even prints Carriage Return codes without zapping the”print position back to the left margin.
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