Portal Server uses JSP files for a channel’s presentation layer. JSPTabContainer references two main JSPs, tab.jsp and tabedit.jsp, through the contentPage and editPage properties.
Content template delivers the front page content of the container channel and the file name for the tab container channel is tab.jsp. The tab.jsp file extensively uses the Desktop taglibraries.
You can use the Edit page to add, remove, and rename tabs. The tabedit.jsp is used to display this page.