Unfortunately, the AUTONUMLGL field does not allow you to specify a
starting value. What you can do is to replace each AUTONUMLGL field
with a LISTNUM field, and then specify the desired starting value for
the first of these fields.
First display field codes (you can press ALT+F9) and then choose
Edit>Replace to change AUTONUMLGL fields to LISTNUM LegalDefault. Then
you'll be able to add the \s switch with the desired starting value.
For example, { LISTNUM LegalDefault \s 100 } would display 100; and
following occurrences at level one would be 101, 102, etc.
Just like AUTONUMLGL fields, LISTNUM fields in heading paragraphs
should be numbered according to their heading levels, but they might
not, depending on their location. I believe table cells cause trouble.
You can work around it by specifying \L followed by the correct level
number, but this might be tricky (or even impossible?) to handle with
find and replace.
