Apple Macintosh PowerBook 150 - Manual (Page 29)

2 Roll the trackball so that the tip of the arrow is on the picture labeled “Macintosh HD.”
Make sure the tip of the arrow is over the picture, not over the words
“Macintosh HD.”
Note: Your screen should look similar to the one below, but may not look
exactly the same.
3 Being careful not to roll the trackball, press the button twice in quick succession. (This is
called “double-clicking.”)
Now your screen should look like the illustration following step 4. The items
in that illustration may not exactly match those on your screen. The only item
you need right now is the Macintosh Basics folder.
If the screen doesn’t look right, try steps 2 and 3 again, paying special
attention to the following:
m Make sure the tip of the arrow is touching the picture, not the words
beneath it.
m Be sure to press the trackball button twice.
m Press twice quickly and be careful not to roll the trackball while you press.
19 Learning to Use Your Computer
Move the arrow so
that it is on top of
this picture.