The All tab of the element manager contains a list of all elements that are defined by the DTD. If you are editing a well-formed XML document, this tab shows the name of all elements that were found when the document was loaded plus all elements that you have declared.
You can get more information about one of the elements shown in this tab by selecting the element and pressing one of the buttons at the bottom of the element manager.
Alternatively, you can right-click on one of the element names and select an operation from the context menu:
Displays the definition of the selected element as defined by the DTD. For elements in DTDless XML documents, a definition of Any will be displayed.
Displays a railroad diagram with a visual representation of the possible element structure. Please refer to Raildroad diagrams for more details.
Opens the style sheet dialog for the selected element. See Style Sheets for more details.
Display a dialog containing information about the possible attributes of the selected element.