When you create a custom form menu, you can specify that some of its items appear on a menu toolbar (a toolbar of iconified buttons that represent individual items from your form menu), also called a Smartbar.
If you use a custom form menu, you must explicitly assign individual menu items to a menu toolbar; you also must provide icons to represent the associated buttons on the menu toolbar; if you use the default form menu, Oracle Forms attaches a default menu toolbar to your form automatically.
You can assign menu items to a horizontal or vertical menu toolbar. Oracle Forms locates a horizontal menu toolbar at the very top of a form (just beneath the pull-down form menu), while a vertical menu toolbar appears at the far left of a form (to the left of any existing toolbar canvas).