Prepared Citation
The term 'prepared citation' has not always been used within Family Historian, but there has been an implicit concept of a prepared citation since automatic source citations were first introduced. This is because the prepared citation details are the details used for automatic source citations - they are the same thing (although the prepared citation is no longer just used for automatic source citations - it is also used by Data Entry Assistant tools, for example). At any given time, there is only ever at most one prepared citation. There may be none. At a minimum, a citation (any citation) consists of a link to a Source record. However, all kinds of details (field values) can be attached to such links, even including notes and media. And this is true of both actual and prepared citations.
You can view the prepared citation (if any) in the Citation Window (see
Citation Window
with a Prepared Citation) or in the Automatic
Source Citation Pane, or in, or in both at the same time.To view
the prepared citation in the Citation Window, click on the Source
button 
on the main application toolbar and choose View Prepared Citation
from the menu that appears. This menu command will be greyed if
there is no prepared citation. To view the prepared citation in
the Automatic Source Citation Pane, just click the Automatic Source
Citation button 
on the main application toolbar. If there is no prepared citation,
the Source field will display a search icon 
and the
button will be disabled and greyed, as in figure 1 below.
Figure 1 - Automatic Source Citation Pane with No Prepared Citation
If there is a prepared citation, the Source field will
display a Source record icon 
and the button will be enabled (not
grey). If automatic source citations are not enabled, it will look
something like figure 2 below.
Figure 2 - Automatic Source Citation with a Prepared Citation
Finally, if there is a prepared citation and automatic source citations are enabled, the large button on the left will be blue and show the word 'Enabled', and the Automatic Source Citation pane will look something like figure 3 below.
Figure 3 - Automatic Source Citation with a Prepared Citation, with Automatic Source Citations Enabled
In practice, most of the time it will be easier to view and work with
prepared citations in the Citation Window (see Citation
Window with a Prepared Citation) - not only because it is a larger
window, with a more convenient layout, but also because you can also
view full details of the Source record at the same time, which you can't
with the Automatic Source Citation Pane. And, most importantly,
you have access to Data Entry
Assistants in the Citation Window, which you don't in the
Automatic Source Citation pane, and you can see how footnotes and
bibliography entries will look in the Citation Window side panel - which
again you can't do in the Automatic Source Citation Pane. But you
can copy a prepared citation in either context. In the Citation
Window you click the button
to do this. In the Automatic Source Citation Pane, you have to
click on the menu button 
and then choose Copy Prepared Citation from the menu that
appears.
We saw above that If you want to view an existing prepared citation in
the Citation Window, one way is to click on the Source button on the
main application toolbar and choose View Prepared Citation
from the menu that appears. However, this menu command will be
greyed if there is no prepared citation. The other way is to click
on the Automatic Source Citation button on the main
application toolbar, and then click the
button when the pane appears. This button will again be greyed if
there is no prepared citation. You can create a new prepared
citation by clicking on any of the first three menu commands on the menu
that appears when you click on the Source button on the main application
toolbar. Or you can create a prepared citation by simply selecting
a Source record in the Automatic Source Citation Pane. By the same
token, if you want to clear the prepared citation, you just need to
clear the selection in the Automatic Source Citation Pane (by, for
example, clicking the Clear button 
to the right of the Source
field).
Prepared citation details are stored persistently in the Family Historian header record, so if you create a prepared citation in one session, it will still be there, and you can still use it, in the next.