Repeat Steps 2 through 4 to draw the remaining straight and curved lines on your inserted image to complete the scale drawing in Excel.

Learn how to insert a diagonal line to a cell in Microsoft Excel and Google Sheets using the Border feature, Drawing tool, Sparkline function, etc.

To do so, click the Line tool and then hold down the Shift key while you click and drag to insert the line. Doing so forces Excel to draw a straight line between the two clicked points.