Excel offers a variety of arrows, boxes, flowchart symbols and other shapes to customize a worksheet. To add a shape, select Insert/Shape and choose one, then click and drag the mouse within the worksheet. To make perfect circles and squares, hold down the Shift key while dragging. To change size, drag the tiny squares ("handles") on the image. Clip Art Excel includes a variety of clip art to enhance your presentation. Select Insert/Clip Art and either double click the object or drag it into the worksheet.