Set up and edit your default invoicing options in Settings. Go to Settings > Invoicing where you can adjust the following:

You can change the look and feel of your emails containing invoices. Email types are HTML or Plain text.

If you want to remove the "This email was sent using Productive.io" footer in your emails, you can toggle the Remove Branding option.
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Customize the sender's email address for invoices sent via email by switching from the default noreply@outbox.productive.io to an address of your preference.

To make this change, you need to set up a custom domain under General Settings. Refer to this article for more information.

Set up the default payment terms by entering the number of days that will be applied as default due payment days.

This can be additionally adjusted for each client when creating an invoice.

Select how your invoice numbers will be generated and whether the delivery date should be displayed on the invoices.

To see a bit more on how to set up the invoicing number format check here.

Note: If you have more subsidiaries (as shown above), you can adjust these options for each subsidiary.