The Tool Bar contains buttons that let you perform many of the same actions as you can do with menus. The available buttons also change depending on which Editor is the active one in the Editors View. Many buttons have keyboard shortcuts, e.g. Ctrl-D for switching between Design and Debug mode in the Robot Editor. You can learn about these by letting the mouse hover for a short while over a given button until a tool tip will appear. If there is a keyboard shortcut to the given button, then this will be shown in the tool tip.