We access toolbar buttons using the mouse, by pointing to one of the available choices and clicking the left mouse button.  It is usually a good idea to know what each button means.  When you point to a button and let the arrow rest on it for a second or two, a small pop up description will appear.

It should be noted, that you can turn toolbars on and off.  New users often turn them off without realizing it.  If your toolbar has disappeared, point to the area located just below the menu bar, tap your right mouse button and choose the desired toolbar from the list provided.