1. An invoice's status must be anything other than "Draft" or "Cancelled". If it has already been exported to Xero, it will not be exported again.
2. Click on the "Export to..." button and select the correct company account if you have more than one connected to Zigaflow.
3. To go to the invoice in Xero, click on the Xero icon
4. When viewing an invoice in Xero you can jump directly to it in Zigaflow