Edit Skin
In a portal, you can edit a skin to meet your requirements. Note that you can not edit built-in skins; you can copy a built-in skin to create a new custom skin for a portal, then edit that copy.
Note:
Creating and editing a skin is a complex task, requiring knowledge of CSS and how the skin is used in page templates. Therefore, skins should be developed by an experienced Web Developer. Oracle recommends that developers use JDeveloper to modify skins for portals. New skins can also be developed from scratch using JDeveloper. When fully developed, the developer can upload skins directly to WebCenter Portal (the portal server) for immediate use or for testing. Alternatively, the developer can export the skin to a file and upload the skin to WebCenter Portal later.
To edit the basic appearance settings of a skin: