Skin rules are part of the User Interface category. A skin rule is an instance of the Rule-PortalSkin rule type.
To access an existing skin rule, do one of the following:
Click Designer Studio > User Interface, Skins, interfaces, & templates. On the Skins tab of the Skins, Interfaces, & Templates screen, click the skin that you want to open.
In the Records Explorer, expand the User Interface > Skin category. Double-click the skin that you want to open.