4. The system of claim 1 , wherein a name of the one or more style properties affecting the section is presented in the graphical overlay.
1. A system embodied upon computer readable storage media for previewing visual changes of a web portal, the system comprising: an administrative component that generates a preview document in response to a request, wherein the preview document is a web page, and wherein the administrative component provides portal configuration information that contains functional characteristics for the web portal and a set of temporary files that provide one or more presentation characteristics for the web portal; a preview document that utilizes the portal configuration information for the functional characteristics of the portal and the temporary files for the presentation characteristics of the web portal, and wherein the preview document includes an instruction set that when processed by an application at a client renders the preview document in a web browser; wherein when a cursor, at the web browser, is positioned over one of said one or more sections of the web portal, the instruction set is read and executed by the application to present, in a graphical overlay at the web browser, an identity of the one or more style properties affecting the one of said one or more sections while the cursor is positioned over the one of said one or more sections, wherein the one or more style properties affecting the section is derived from a structured style sheet, and wherein the identity of the one or more style properties affecting the section includes an indication of whether the one or more style properties is inherited; and wherein upon receiving a modification to the set of temporary files that changes the one or more style properties affecting the presentation characteristics of the web portal, a request is sent to accept modifications to the set of temporary files, and wherein accepting the modifications initiates a copy process to update the portal configuration information to include the set of temporary files as modified.