The invention relates to a drawing-board (10), on which a sheet of drawing-paper is clamped. A first guide element (2) at the end of a T-square (3) is guided on the drawing-board through an arc of at least 180 DEG . A second guide element (12) at the end of the T-square is guided in a straight line on the first guide element (2), it being possible to guide the T-square in any angular position using the first guide element and over the entire area of the sheet of drawing-paper by means of the second guide element. <IMAGE>
