Periodically, web parts in SharePoint may not act the way that you anticipate them too. One method that isn’t very well publicized in the SharePoint documentation is to append “?Contents=1″ to the query string. This actually changes the URL to point to an administrative page, spcontnt.aspx, in the Layouts directory, the “Web Part Maintenance Page”. It then passes to this page, the Site Name and Page Name as parameters.

Here are a few other query string shortcuts you might find helpful.

To open the Web Part Maintenance Page
“?Contents=1″

To Open the Page in Web Part Design Mode
“?ToolPaneView=2″

To Open the Search Web Part Zone
“?ToolPaneView=3″

To open the Design Bar - Useful for pages in the Pages Library
“?DisplayMode=Design”

To turn on Web Part Zone Editing
“?ControlMode=Edit”

To Show the Shared version of a page
“?PageView=Shared”

To Show the Personal version of a page
“?PageView=Personal”

Feel free to share other parameters that are not included in the list.