It is possible to switch the text colors or underlining within text output, e.g. drawing of labels or info fields. This is controlled by special characters in the strings. Note: The ASCII value of the control characters depends on the operating system and C compiler. The following control characters are allowed:
"\n"
(ASCII code 10)
"\t"
(ASCII code 9)
"\a"
(ASCII code 7)
"\b"
(ASCII code 8)
"\f"
(ASCII code 12)
"\fu"
(ASCII codes 12 117)
starts underlining.
"\fI"
(ASCII codes 12 73)
starts italics typeface.
"\fb"
(ASCII codes 12 98)
starts bold typeface.
"\fB"
(ASCII codes 12 66)
starts very bold typeface.
"\fn"
(ASCII codes 12 110)
stops underlining, italics and bold typefaces,
i.e. returns to normal typeface.
"\fi000"
(ASCII codes 12 105 48 48 48)
prints the ISO character 0.
"\fi223"
(ASCII codes 12 105 50 50 51)
prints the ISO character 223 (the German ß).
"\fi252"
(ASCII codes 12 105 50 53 50)
prints the ISO character 252 (the German ü).