Properties of the Graph style
After inputting an expression, the expression is displayed in the Function Properties window. Decide the graph color, the thickness, the line style, and On/Off of the after-image, and then click [OK].
To change the color, thickness, or line style, select from the menu which appears when the cursor points to a part of the image.
To edit the expression of function at this moment, click the expression part.
With this operation, the graph of the function will be drawn. If the expression contains some parameters, the graph will move when the parameter is changed.