OCR: You can use this command for drawing the contours of function of the type F(X1 the function currently selected in the "Func" menu. and are either the function's value or one of its parameters Select and X2 from the dndod menus. The contours can either be drawn at regular intervals (select Reqular contour levels custom intervals (select Custom contour levels If you have selected "Custom contour levels" you must select window and a col in this window. This column contains list of X -values where contours are drawn. The following columns can specify further, optional parameters if they hav one of the following names: "thickness": specifies the thickness of each contour line 'dash" specifies the dash pattern of each contour line II "g" .q. specify the colour (red/green/blue-values) specifies t ...