The following updates have been made to the manual to make things clearer:
 On page 3, the following paragraphs have been changed - please read them to
avoid confusion!

  The database macros are not directly related to one particular field in
the main mail-merge CSV file, so choose field numbers that are unlikely to
conflict with actual fields, eg 100 onwards.  A common set of database merge
fields can be inserted with a mouse click: just choose the menu option
Applets->Database->add set of dbase merge fields.  Then open the Fields
window (it opens automatically in version 2.49) to modify them as described
below.  Note that only templates for the commands are inserted, with blank
parameters which you should fill in as you wish.  [The field numbers chosen
are 100 to 104, and no check is made that these fields have not already been
defined.]  Note that you must then refer to these fields with suitable merge
commands in the text, not forgetting the one (normally field 100) which
loads the CSV files  it's not adequate just to specify it in the Fields
window!


To start a mail-merge operation, load the document into Ovation Pro, or save
it if you have just been adding merge commands and fields.  Choose
Files->Mail merge... from the menu. Drop the CSV file onto the resulting
Mail merge window.  If, as is usually the case, the first row of the CSV
file is a list of item names, click to tick the Ignore headings record icon. 
If you do not have this icon ticked, and you are using Ovation Pro version
2.49 or later, then the names used will be just 1, 2, etc, so you would
refer to [1] instead of, for example, [itemname].  [Let the author know
if this should be made more useful, or extended to the CSV files other than
the main one.]  Click First to start the merge operation.  ...