The Web Part editor displays. Its contents depend on the type of Web Part in use. The figure shows the Web Part editor for the Shared Documents library of a team site. Some Web Parts allow you to open their editor when the page is in edit mode by displaying a link. Others, like the
Chart Web Part are very sophisticated and provide wizards for advanced configuration.
The Web Part editor is divided by categories of configurable properties. A few of these categories are available on almost every Web Part. The one you will use most commonly is Appearance