Release the mouse button and the line or arrow is displayed. Click-and-drag at the desired location in the graph window. 12 Adding Asterisk Brackets Indicating Groupings on Statistical Chartsĭrawing straight lines or arrows To add a straight line or arrow to the graph window:.11 Copying Line Objects and Pasting Data to a Worksheet.8.1 To add a square, rectangle, circle, oval, polygon or region.2.1 To add a curved arrow to the graph:.1.1 To add a straight line or arrow to the graph window:.