Backtrack -- returns to the previous topic. To retrace topics visited, press Backtrack repeatedly until the desired topic is displayed.
History -- displays the History dialog box. This dialog box lists the help volumes and topics that have been visited. To return to any topic in the list, select its title.
Index -- displays the Index Search dialog box. This dialog lists all the words and phrases that the author has marked as index entries. Selecting an index entry, then one of the topics where the entry occurs, displays that topic in the general help dialog.
When using the Help Viewer from the desktop Front Panel, the general help dialog includes an additional dialog button called Top Level. After exploring different help volumes, a user can select this button to return to the top-level of the desktop browser help volume.