2. An area exposure apparatus according to claim 1 wherein said converter (35) is for feeding into said X register (42) rotation X distance data of a freely selectable distance between one typesetting margin X.sub.r0 of said recording carrier (12) to the next lines rotated about 90.degree., and the distances between the subsequent rotated lines, and said converter being for feeding into said Y register (40) the rotation Y distance data between a freely selectable rotation raster including rotation raster lines (Y.sub.r0, Y.sub.r1, Y.sub.r2) in the X direction, and the side edge of the rotated character.
2. An area exposure apparatus according to claim 1 wherein said converter (35) is for feeding into said X register (42) rotation X distance data of a freely selectable distance between one typesetting margin X.sub.r0 of said recording carrier (12) to the next lines rotated about 90.degree., and the distances between the subsequent rotated lines, and said converter being for feeding into said Y register (40) the rotation Y distance data between a freely selectable rotation raster including rotation raster lines (Y.sub.r0, Y.sub.r1, Y.sub.r2) in the X direction, and the side edge of the rotated character. 4. An area exposure apparatus according to claim 2 wherein a text decoder (34) is provided, for feeding text data, including end-of-line commands and width values of characters of text, and for, when decoding text exceeding a given length to width ratio and falling short of the typesetting width of the carrier, activating said converter (35) for rotating the text.