To add a sub-panel to a row on a ribbon panel
- Click Tools
tab
Customization
panel
User
Interface.
At the command prompt,
enter cui. - In the Customize User Interface Editor, Customize tab, in the Customizations In <file name> pane, click the plus sign (+) next to Ribbon Panels to expand it.
- Click the plus sign (+) next to the ribbon panel where you want to add a sub-panel.
- Create a new row for the sub-panel if needed, or click the plus sign (+) next to the row where you want to add a sub-panel.
- Click the plus sign (+) next to the row where you want to add a sub-panel.
- Select the row where you want to add a sub-panel.
- Right-click
the selected row. Click New Sub-Panel.


- Click OK.