### Handling Text Strings

A text string (plotted by command LABEL or DRAW TEXT) can include the escape character “” which is used to generate superscripts and subscripts and to monitor the font used. This escape character may be used in 2 ways

            \\X - set mode X until other mode change sequence
            \X  - set mode X for next character only

where X can be any of the following values and causes the following actions :

            N - Switch to current default character set
            1 - Switch to Simplex character set
            2 - Switch to Duplex character set
            R - Roman font
            G - Greek font
            S - Script font
            I - Toggle italics
            U - Increase superscript/subscript level (move Up)
            D - Decrease superscript/subscript level (move Down)
            B - Backspace over previous character

Superscript and subscripts are handled using a “level” philosophy. U increases the level by 1, D decreases it by 1 and the size of the characters is (0.7)**ABS(level) times the current defined size. The italic mode is toggled by the I escape code. The character size is defined using command SET CHARACTER.