Clicking on one of the words in the Menu Bar typically causes a dro-down menu to appear, from which you can select the action you want to perform (tyipcally on an object already selected in the work area). Occasionally menu items will display sub-menus. Simply follow the menu tree down with your mouse and click on the action you want to perform.
Alternately (and this was the original Apple Macintosh way to operate menus, and it still works in Windows), you can click on the menu item and leave the left mouse button down. While the mouse button is down, move the mouse down the desired menu item and then release the mouse button.
A toolbar almost always has iconic buttons, but can have many other types of controls. Pictured here are several drop-down lists in addition to buttons.
As always, click (or tab) in the text box to move keyboard focus to the textbox before typing. A (sometimes flashing) virtical "I-beam" in the textbox indicates the textbox has keyboard focus.
Panels such as these often have a tree structure in it that can be used to select actions and/or navigate the document or web pages. Click in it to indicate where you want to go.
See the row with the blue background? That row is SELECTED in the list. Selecting a menu action while it is selected, or right-clicking the selected row, will often display a list of actions you can choose from. Select by left-clicking the desired action, or hitting the [ESC] key (or clicking elsewhere) to not perform any action.
Clicking a different tab displays a different set of controls on the page, as though it were tabs in a notebook (or binder) used to open the notebook to the selected page.
