Let's start with some essential techniques...
To open up some additional screen space, collapse the Output bar by clicking the Output Bar button:


To rotate the model, press Shift and the middle mouse button, and move the mouse:

To zoom, roll the scroll wheel:

To pan (move), hold the middle mouse button, and move the mouse:

To see the internal components, hide the casing part and then the air part. To do this, position the curser over each, press Ctrl and the middle mouse button:
Hide casing:

Hide air:

An alternative way to hide parts is to left click on the part, and click the Hide icon from the context toolbar:

Now we can see the chips, boards, fan, and other components!

To show all the parts, press Ctrl and middle click off the model in the graphics window:

An alternative way to show all parts is to left click off the model, and click the Show All icon from the toolbar:


Make sense? In the next steps, we rotate, pan, and zoom the model and hide parts. It's a good idea to get familiar with these useful techniques.