The same principle applies to adding before paragraph 1.
1. Put your cursor at the end of the preceding paragraph
2. Add the content (it won't be part of the list)
3. Select the complete list (including the new paragraph) and reapply your list formatting/style. You may need to restart the number and get the old #1 to continue the numbering.
4. Update your xRef fields.

An alternative is to add the new line to the end of the list, then select all the previous existing list paragraphs and press Alt+Shift+Down Arrow to move them below the new entry.

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Andrew Lockton
Chrysalis Design, Melbourne Australia