Which option can be used to customize the appearance of invoices in QuickBooks?

The option to customize the appearance of invoices in QuickBooks is through Custom Form Styles. This feature allows users to alter various aspects of their invoices, including font styles, colors, and the overall layout. With Custom Form Styles, you can create a unique look for your invoices that reflects your brand, making them more professional and appealing to clients.

This capability enhances the user experience by providing flexibility in presentation, which is particularly important for businesses to maintain a consistent branding image. It also allows for adjustments to meet the specific needs or preferences of different customers.

While other options might suggest various functionalities related to invoices, they do not focus primarily on visual customization. The Invoice Creation Wizard, for instance, helps users generate invoices but doesn't directly address appearance modifications. Design Layouts might imply structural changes, but it is not a recognized term within QuickBooks for adjusting invoice formats. Invoice Settings generally pertain to the overall functionality and configuration of invoice features rather than their design. Thus, the correct answer effectively identifies the specific tool used for the visual customization of invoices in QuickBooks.