We can also double click on our FooterHeader and from Design tab select again Page Number Format Page Numbers In pop-up window under Page numbering we can see Start at. Make sure the insertion point stays between the braces. If you want to add a new section break click the Breaks button.
Key in seq followed.
If you want to add a new section break click the Breaks button. Click on the Numbering tab. To change the numbering alignment go to Header Footer Page Number Page Number. Create a text file named invoice-numbertxt in the folder.