How to change format for diagram shapes in Excel
To change the format of the flowchart shape or the diagram shape, select it and then do one of the following:
- When you select a shape, Excel appears a Drawing Tools toolbar:
Under Drawing Tools, on the Format tab, in the Shape Styles group, click the dialog box launcher:
- Right-click on the selected shape and choose Format Shape... in the popup menu:
In the Format Shape pane, choose format options:
See also this tip in French: Comment modifier le format des formes de diagramme dans Excel.