Use the Message portlet to create and display messages in HTML or regular text. The Admin, Welcome, Sample, and Task Message portlets are instances of the Message portlet.
In HTML, messages display on the portlet as they would on a Web browser. The height and width of the portlet can be set in the Portlet Preferences Editor.
You can use certain variable expressions, also called portal macros, in the portlet preference values for substitution parameters.