In addition to composite object history, you can look at how a single
item has developed. To do so, make sure that focus is in the correct
item by clicking there and click on the Command Menu
`Item History ...' button. That will pop up a window with circled
numbers. Clicking in the circles will put that version of the item
into the view. Note that when you do this, the view ceases to be
editable, but that it does change the composite object. If you want to
promote an old version to be the latest version (see section
3.8), use the `Promote' button. In order to make the view editable
again, bring up the composition history (section
3.5) and click on the leftmost circle. Figure
3.9 shows an example of an item history with
parallel development (two users worked on the component at the same
time).