Adding a parent skin
You can add a parent to an existing skin. When you add a parent to a skin, the skin becomes dependent on the parent and inherits styles and formats from the parent. If the parent skin is changed, those changes are inherited by the dependent skin.
Open the skin to which you want to add a parent.
On the Inheritance tab of the Skin rule form, enter the parent skin name in the Skin inheritance field or click the Open icon to select from a list of available skins.
Save the skin.
Optionally, if you want to inherit base settings from the parent, select the Inherit from parent check box on the Base settings tab of the dependent skin.