The first thing to become familiar with is the row of buttons on the toolbar which affect the Musical Pieces window. Hovering the mouse cursor over a button for about one second will show a tool tip which displays the name of that button.
Directly under the menu word "Tools", the button with the white square and the 16th-note (semiquaver) allows you to show and hide the Musical Pieces window itself.
The buttons which control features of the Musical Pieces window begin under the menu word "Help".
The button with the pink, green, and blue rectangles opens and closes the Outline View, which will be explained in more detail below.
The button with the bad drawing of two outstretched arms opens and closes the Conductor View, which will be explained in detail below.
The last three buttons in this toolbar control how far in and out you can zoom on the Musical Pieces window.
The button with the large square on it zooms in, to allow you to see greater detail, but less area.
The button with the small square on it zooms out, to allow you to see more area but less detail.
The button with the medium-sized square on it means "no zoom", and returns your zoom to the default size.