If you create your data source in Word using Mail Merge Manager->get
List->New Data Source, Word creates a new Word document that holds the
mailmerge data in a Word table.
Since a Word table can only have 63 columns, that restricts what you can
do at the time you create the data source.
However, for example, if you have a 63-column data source and you want
to add another column, you can
a. make a backup copy of your data source document
b. open the data source document
c. select the table
d. Table->Convert table to text (e.g. use a tab as the separator)
e. add a new column header
Unfortunately
f. you then have to add a new column to every row (e.g. an extra tab
will do it if the tab is the separator)
g. if you have any tab characters in your data, this will not work
h. if you have multiline data, this will not work. On Mac, I don't
know for sure what will although you would probably have to wrap up any
multi-line data in double-quotes
If you have Excel, you might be better off transferring your merge data
into that - e.g., open the mail merge data source document, select the
table, edit-copy, edit-paste into Excel, save that. Then use that as the
data source. However, then you'll need to maintain your data in Excel as
you probably won't be able to use the editing facility within Mail Merge
Manager.
If you are thinking of creating large amounts of data for re-use in
merge, it's probably going to be worth while thinking a bit more about
how you want to organise your data longer term. However, Word on Mac
only recognises a small number of data source types - e.g. text files,
Word documents, Excel worksheets, and Filemaker Pro databases, if you
have that product.
Peter Jamieson
http://tips.pjmsn.me.uk