You can add freeforms and other drawing objects only to a chart. You cannot add them to the datasheet.
Click Scribble when you want an object to look as if it was drawn with a pen.
To close a shape, click near its starting point.
Tip After you complete a freeform, you can close an open shape or open a closed one. Right-click the shape, and then click Close Curve or Open Curve on the shortcut menu.