To Create a New Drop-down Button from an Existing Drop-down Button

Do one of the following:

Select File > Settings > User > Customize Ribbon .
Right-click in the blank space in the ribbon and select Customize Ribbon from the pop-up menu.

The Customize Ribbon dialog opens.

In the list below Customize the Ribbon, navigate to the group in which you want to create the drop-down button.

In the Choose components from drop-down list, select Drop-down Buttons.

Do one of the following:

From the list below Choose components from, select the desired drop-down button and then click Add.
From the list below Choose components from, select and drag the desired drop-down button to the list below Customize the Ribbon.

Optional: Do one of the following:

Click Rename and rename the new drop-down button.
Rename the new drop-down button in the Label field in the Properties section.

Optional: In the Properties section, from the Visibility drop-down list, select the visibility expression.

Note: The Visibility property holds the name of a named expression that will be evaluated each time the active model is changed to determine whether the item should be displayed. The named expression should return a boolean (True or False) result in order to work properly as a Visibility property.

Optional: Set other properties, as desired.

Click Apply.