aiSee User Manual: Character Set

It is possible to switch the text colors or text style within text output, e.g. within edge labels or node info fields. This is controlled by special characters in the strings. The following control characters are allowed:

\n (ASCII code 10)
New line, drawing of text continues at the beginning of the next line
\t (ASCII code 9)
Tab, corresponds to eight space characters
\a (ASCII code 7)
Beep, produces an audible or visible alert. The position of the next character is not to be changed.
\b (ASCII code 8)
Backspace, goes one character back and continues drawing there.

Formfeed

The formfeed \f (ASCII code 12) is used in combination with an additional parameter to change the current form of output:

\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) returns to normal typeface, i.e. stops underlining, italics and bold typefaces
as of aiSee 2.2.04 \f- (ASCII codes 12 45) draws a horizontal line within a node
Special characters (all characters of the ISO Latin 1 character set) can be specified by their character numbers. For example, \fi035 prints the ISO character 35 (the hash #), \fi037 prints the ISO character 37 (the ampersand &), etc.
The formfeed character followed by two digits signifying a color (see color codes table) changes the color for the characters following in a string, thus enabling the first 100 colors of the map to be accessed. For example, \f00 sets the color to white, \f31 sets the color to black, etc.

Please note that the ASCII values of the control characters depend on the operating system and C compiler.

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