This is Behold's menu bar. Selecting one brings up its submenu.
If you press the Alt key and then press the underlined letter, you will activate the menu item with the underlined letter. This is a standard Windows capability and is implemented in Behold for all menus and submenus.
Submenu items, e.g.:
Submenu items such as Open may show an icon on the left. This icon may appear on the toolbar.
Three periods following the item name tells you that this function will open a window asking for more information. Items not followed by three periods are executed immediately.
If the command has a keyboard shortcut, then it is shown on the right.
If the item is greyed out, then that command is cannot be executed in the current context.
Open, close, and do other neat stuff with files. See: The File Menu