10. A system for modifying appearance and behavior of a web parts page including web parts, comprising: a computing device; and an application included on the computing device, wherein the application is configured to: instantiate a tool pane as part of the web parts page by adding code within code of an already instantiated web parts page; wherein the tool pane includes selected functions to modify the web parts page; wherein the web parts page includes web zones that include one or more web parts; wherein the functions are selected from functions that effect a layout of the web parts page; functions that change a setting for a web part within the web parts page; functions that change a number of web parts included in the web parts page; and functions that effect an appearance of the web parts page; receive an input indicating to perform one of the functions included within the tool pane; dynamically modify the web parts page according to performing the function; wherein the same web parts page remains displayed; modifying the tool pane in response to the modification of the web parts page such that different functions are included within the tool pane within the web parts page; and closing the tool pane.
10. A system for modifying appearance and behavior of a web parts page including web parts, comprising: a computing device; and an application included on the computing device, wherein the application is configured to: instantiate a tool pane as part of the web parts page by adding code within code of an already instantiated web parts page; wherein the tool pane includes selected functions to modify the web parts page; wherein the web parts page includes web zones that include one or more web parts; wherein the functions are selected from functions that effect a layout of the web parts page; functions that change a setting for a web part within the web parts page; functions that change a number of web parts included in the web parts page; and functions that effect an appearance of the web parts page; receive an input indicating to perform one of the functions included within the tool pane; dynamically modify the web parts page according to performing the function; wherein the same web parts page remains displayed; modifying the tool pane in response to the modification of the web parts page such that different functions are included within the tool pane within the web parts page; and closing the tool pane. 17. The system of claim 10 , wherein the application is further configured to evaluate for associated properties and the properties are displayed in the instantiated tool pane.