There are three kinds of toolbar in the Workbench.
The main toolbar, sometimes called the Workbench toolbar, is displayed at the top of the Workbench window, directly beneath the menu bar. The contents of this toolbar change based on the active perspective. Items in the toolbar might be enabled or disabled based on the state of either the active view or editor. Sections of the main toolbar can be rearranged using the mouse.
There are also individual view toolbars, which appear in the title bar of a view. Actions in a view's toolbar apply only to the view in which they appear. Some view toolbars include a Menu button, shown as an inverted triangle, that contains actions for that view.
Finally, the shortcut bar is a vertical toolbar that appears along the left edge of the Workbench window. The shortcut bar allows quick access to perspectives that are currently open. It also contains fast views, which you can create as shortcuts to the views you use most often.
In all cases, you can find out what toolbar buttons do by moving your mouse pointer over the button and reading the tooltip that opens. See the list of related reference topics below for a table of all toolbar buttons.
Workbench
Views
Perspectives
Fast views