9. Using the guides we just created position the text
tool near the bottom of the first spine. Left click
and a text box will open. Type in the text you
want to appear (I used "Disk 1", "Disk 2", etc...) and click
on "apply". The box will disappear and the text you entered
will be over the lower part of the image. Run the mouse over
the text and watch for it to change to a "crossed arrow". When
it changes press and hold the left mouse button down. You can
now drag the text into position (centered in between the
vertical guide lines and just under the horizontal line). When
it is in the position you want release the mouse button
and press "ctrl-d" (this will deselect the text). Repeat this with
the rest of the spines (changing the text each time) until
they are all done: