If you have a lot of customers that you would like to create a repeat invoice for and have an existing repeat invoice that is similar or identical you can use the Copy function to copy it and then modify any settings by selecting it from the list.
Copying Repeat Billing Invoice
To do that, go to Invoices > Repeat Invoices > Select the repeat invoice to copy > Click the copy button at the top. You can then modify the details and click the Save button.