This toolbar contains the "traditional" drop-down menus, as well as controls for modifying the appearance of the Lister.

On the left-hand side of this toolbar are several drop-down menus:
On the right-hand side are the following menus and commands:
View Mode:
This is a combined button and menu. The button part provides a quick,
convenient way to toggle between the Details and Thumbnails view modes. The
menu part lets you switch between the various view modes in the current file display. It also
contains sub-menus that let you modify the sorting and grouping of the current
display.
Folder
Options: This drop-down menu contains commands to access the Folder Options dialog, and the
Folder Formats system. If
you have created any Favorite folder formats you can select
them from this menu. This menu also contains commands to manipulate Folder Tabs, Flat View, Checkbox Mode, Navigation Lock and various filtering commands.
Lister
Configuration: This drop-down menu contains commands to toggle the folder tree, metadata panel and status bar on or off, as well as displaying a list
of your configured Lister Styles.
Dual
Display: This button toggles dual display mode on or off.
Viewer
Pane: This button toggles the viewer pane on or off.
Help: The Help
menu contains links to various useful web sites (the main GP Software support site as
well as the Opus Resource
Centre), as well as a link to this help file itself. This menu also
contains commands to access the Licence Manager, information about
the program (about) and the check for updates function.
The items on the right-hand side of the toolbar are presented as graphical buttons largely to save space in the toolbar. It's worth learning their "real" names as they are often referred to by name in this help file. Remember you can always find out what a toolbar button does by hovering over it with the mouse to display its tooltip.