You can change built-in controls or custom controls.
To modify an existing control
Open the UI Designer.
In the Design View pane, from the Ribbon simulation, select the control that you want to modify.
NOTE:To select a button group, click the bottom edge of the group, or, select one of its buttons, and then, under Arrange Controls, click Select Parent. To select a group, click the group name.
In the Settingspane, make your changes.
Click OK.