11. A transmitter comprising means for transferring an information signal to receiver via a transfer medium, the information signal comprising main data and sub data, the sub data comprising coded text lines having a plurality of character codes, wherein the coded text lines comprises control codes for controlling display of characters representing the coded text lines on a display unit of which the number character positions on a display line is less than the number of characters in the coded text lines.
11. A transmitter comprising means for transferring an information signal to receiver via a transfer medium, the information signal comprising main data and sub data, the sub data comprising coded text lines having a plurality of character codes, wherein the coded text lines comprises control codes for controlling display of characters representing the coded text lines on a display unit of which the number character positions on a display line is less than the number of characters in the coded text lines. 14. The transmitter as claimed in claim 11 , wherein the control codes comprises marking codes for marking groups of characters to be displayed on the display unit with a limited number of display positions.